diff --git a/packages/openapi-typescript/examples/simple-example.ts b/packages/openapi-typescript/examples/simple-example.ts
index 0c2580003..6e51b6a3d 100644
--- a/packages/openapi-typescript/examples/simple-example.ts
+++ b/packages/openapi-typescript/examples/simple-example.ts
@@ -3,452 +3,462 @@
  * Do not make direct changes to the file.
  */
 
+export interface Pet extends _Pet { };
+export interface Pets extends _Pets { };
+export interface Model extends _Model { };
+export interface person extends _person { };
+
+type _Pet = components["schemas"]["Pet"];
+type _Pets = components["schemas"]["Pets"];
+type _Model = components["schemas"]["Model"];
+type _person = components["schemas"]["person"]
+
 export interface paths {
-    "/pets/items": {
-        parameters: {
-            query?: never;
-            header?: never;
-            path?: never;
-            cookie?: never;
-        };
-        /** Get Test! Foo! Etc! */
-        get: operations["getTest"];
-        put?: never;
-        post?: never;
-        delete?: never;
-        options?: never;
-        head?: never;
-        patch?: never;
-        trace?: never;
+  "/pets/items": {
+    parameters: {
+      query?: never;
+      header?: never;
+      path?: never;
+      cookie?: never;
     };
-    "/pets": {
-        parameters: {
-            query?: never;
-            header?: never;
-            path?: never;
-            cookie?: never;
-        };
-        /** List all pets */
-        get: operations["listPets"];
-        put?: never;
-        post?: never;
-        delete?: never;
-        options?: never;
-        head?: never;
-        patch?: never;
-        trace?: never;
+    /** Get Test! Foo! Etc! */
+    get: operations["getTest"];
+    put?: never;
+    post?: never;
+    delete?: never;
+    options?: never;
+    head?: never;
+    patch?: never;
+    trace?: never;
+  };
+  "/pets": {
+    parameters: {
+      query?: never;
+      header?: never;
+      path?: never;
+      cookie?: never;
     };
-    "/pets/model": {
-        parameters: {
-            query?: never;
-            header?: never;
-            path?: never;
-            cookie?: never;
-        };
-        /** List all pets */
-        get: operations["listPetsModel"];
-        put?: never;
-        post?: never;
-        delete?: never;
-        options?: never;
-        head?: never;
-        patch?: never;
-        trace?: never;
+    /** List all pets */
+    get: operations["listPets"];
+    put?: never;
+    post?: never;
+    delete?: never;
+    options?: never;
+    head?: never;
+    patch?: never;
+    trace?: never;
+  };
+  "/pets/model": {
+    parameters: {
+      query?: never;
+      header?: never;
+      path?: never;
+      cookie?: never;
     };
-    "/pets/person": {
-        parameters: {
-            query?: never;
-            header?: never;
-            path?: never;
-            cookie?: never;
-        };
-        /** List all pets */
-        get: operations["listPetsPerson"];
-        put?: never;
-        post?: never;
-        delete?: never;
-        options?: never;
-        head?: never;
-        patch?: never;
-        trace?: never;
+    /** List all pets */
+    get: operations["listPetsModel"];
+    put?: never;
+    post?: never;
+    delete?: never;
+    options?: never;
+    head?: never;
+    patch?: never;
+    trace?: never;
+  };
+  "/pets/person": {
+    parameters: {
+      query?: never;
+      header?: never;
+      path?: never;
+      cookie?: never;
     };
-    "/": {
-        parameters: {
-            query?: never;
-            header?: never;
-            path?: never;
-            cookie?: never;
-        };
-        /** Some summary */
-        get: operations["getEmptyOperationId"];
-        put?: never;
-        post?: never;
-        delete?: never;
-        options?: never;
-        head?: never;
-        patch?: never;
-        trace?: never;
+    /** List all pets */
+    get: operations["listPetsPerson"];
+    put?: never;
+    post?: never;
+    delete?: never;
+    options?: never;
+    head?: never;
+    patch?: never;
+    trace?: never;
+  };
+  "/": {
+    parameters: {
+      query?: never;
+      header?: never;
+      path?: never;
+      cookie?: never;
     };
-    "/{var}": {
-        parameters: {
-            query?: never;
-            header?: never;
-            path?: never;
-            cookie?: never;
-        };
-        get?: never;
-        put?: never;
-        post?: never;
-        delete?: never;
-        options?: never;
-        head?: never;
-        patch?: never;
-        trace?: never;
+    /** Some summary */
+    get: operations["getEmptyOperationId"];
+    put?: never;
+    post?: never;
+    delete?: never;
+    options?: never;
+    head?: never;
+    patch?: never;
+    trace?: never;
+  };
+  "/{var}": {
+    parameters: {
+      query?: never;
+      header?: never;
+      path?: never;
+      cookie?: never;
     };
-    "/unevaluated-properties": {
-        parameters: {
-            query?: never;
-            header?: never;
-            path?: never;
-            cookie?: never;
-        };
-        /** Checks if unevaluetedProperties work */
-        get: operations["getUnevaluatedProperties"];
-        put?: never;
-        post?: never;
-        delete?: never;
-        options?: never;
-        head?: never;
-        patch?: never;
-        trace?: never;
+    get?: never;
+    put?: never;
+    post?: never;
+    delete?: never;
+    options?: never;
+    head?: never;
+    patch?: never;
+    trace?: never;
+  };
+  "/unevaluated-properties": {
+    parameters: {
+      query?: never;
+      header?: never;
+      path?: never;
+      cookie?: never;
     };
+    /** Checks if unevaluetedProperties work */
+    get: operations["getUnevaluatedProperties"];
+    put?: never;
+    post?: never;
+    delete?: never;
+    options?: never;
+    head?: never;
+    patch?: never;
+    trace?: never;
+  };
 }
 export interface webhooks {
-    newPet: {
-        parameters: {
-            query?: never;
-            header?: never;
-            path?: never;
-            cookie?: never;
-        };
-        get?: never;
-        /**
-         * Edit new pet
-         * @description Edit pet.
-         */
-        put: operations["editPet"];
-        /**
-         * Add a new pet to the store
-         * @description Add new pet to the store inventory.
-         */
-        post: operations["addPet"];
-        delete?: never;
-        options?: never;
-        head?: never;
-        patch?: never;
-        trace?: never;
+  newPet: {
+    parameters: {
+      query?: never;
+      header?: never;
+      path?: never;
+      cookie?: never;
     };
+    get?: never;
+    /**
+     * Edit new pet
+     * @description Edit pet.
+     */
+    put: operations["editPet"];
+    /**
+     * Add a new pet to the store
+     * @description Add new pet to the store inventory.
+     */
+    post: operations["addPet"];
+    delete?: never;
+    options?: never;
+    head?: never;
+    patch?: never;
+    trace?: never;
+  };
 }
 export interface components {
-    schemas: {
-        /** @description schema for a rfc7807 */
-        Problem: {
-            /**
-             * Format: uri
-             * @description A URI reference [RFC3986] that identifies the problem type.
-             */
-            type: string;
-            /** @description A short, human-readable summary of the problem type. */
-            title: string;
-            /** @description The HTTP status code ([RFC7231], Section 6) generated by the origin server for this occurrence of the problem. */
-            status: number;
-            /** @description A URI reference that identifies the specific occurrence of the problem. */
-            instance: string;
-            /** @description A human-readable explanation specific to this occurrence of the problem. */
-            detail: string;
-        };
-        Pet: {
-            /** Format: int64 */
-            id: number;
-            name: string;
-            none?: null;
-            tag?: null | string | number;
-            arr?: unknown[];
-            either?: string | null;
-        };
-        Pets: components["schemas"]["Pet"][];
-        Model: {
-            /** @description type array */
-            one?: number | string;
-            /** @description type 'null' */
-            two?: null;
-            /** @description type array including 'null' */
-            three?: string | null;
-            /** @description array with no items */
-            four?: unknown[];
-            /** @description singular example */
-            five?: string;
-            /** @description exclusiveMinimum true */
-            six?: unknown;
-            /** @description exclusiveMinimum false */
-            seven?: unknown;
-            /** @description exclusiveMaximum true */
-            eight?: unknown;
-            /** @description exclusiveMaximum false */
-            nine?: unknown;
-            /** @description nullable string */
-            ten?: string | null;
-            /** @description file/binary */
-            eleven?: unknown;
-        };
-        person: {
-            /** @description Person ID */
-            id: number | string;
-            name?: string;
-            /** @enum {string|integer} */
-            gender?: "male" | "female" | "unknown";
-            /** @description location can be null, set using `nullable` property thats supported by OpenAPI `3.0.x` */
-            location?: string | null;
-            /** @description Age of Person */
-            age?: number;
-            /** @description One URL or Array or URLs or set to false */
-            photoUrls?: string[] | boolean | string;
-            /** @description comma separated list of hobbies or an array of object */
-            hobby?: string | {
-                hobbyRank?: number;
-                hobbyName?: string;
-            }[];
-            empty?: unknown;
-        };
+  schemas: {
+    /** @description schema for a rfc7807 */
+    Problem: {
+      /**
+       * Format: uri
+       * @description A URI reference [RFC3986] that identifies the problem type.
+       */
+      type: string;
+      /** @description A short, human-readable summary of the problem type. */
+      title: string;
+      /** @description The HTTP status code ([RFC7231], Section 6) generated by the origin server for this occurrence of the problem. */
+      status: number;
+      /** @description A URI reference that identifies the specific occurrence of the problem. */
+      instance: string;
+      /** @description A human-readable explanation specific to this occurrence of the problem. */
+      detail: string;
     };
-    responses: never;
-    parameters: never;
-    requestBodies: never;
-    headers: never;
-    pathItems: never;
+    Pet: {
+      /** Format: int64 */
+      id: number;
+      name: string;
+      none?: null;
+      tag?: null | string | number;
+      arr?: unknown[];
+      either?: string | null;
+    };
+    Pets: Pet[];
+    Model: {
+      /** @description type array */
+      one?: number | string;
+      /** @description type 'null' */
+      two?: null;
+      /** @description type array including 'null' */
+      three?: string | null;
+      /** @description array with no items */
+      four?: unknown[];
+      /** @description singular example */
+      five?: string;
+      /** @description exclusiveMinimum true */
+      six?: unknown;
+      /** @description exclusiveMinimum false */
+      seven?: unknown;
+      /** @description exclusiveMaximum true */
+      eight?: unknown;
+      /** @description exclusiveMaximum false */
+      nine?: unknown;
+      /** @description nullable string */
+      ten?: string | null;
+      /** @description file/binary */
+      eleven?: unknown;
+    };
+    person: {
+      /** @description Person ID */
+      id: number | string;
+      name?: string;
+      /** @enum {string|integer} */
+      gender?: "male" | "female" | "unknown";
+      /** @description location can be null, set using `nullable` property thats supported by OpenAPI `3.0.x` */
+      location?: string | null;
+      /** @description Age of Person */
+      age?: number;
+      /** @description One URL or Array or URLs or set to false */
+      photoUrls?: string[] | boolean | string;
+      /** @description comma separated list of hobbies or an array of object */
+      hobby?: string | {
+        hobbyRank?: number;
+        hobbyName?: string;
+      }[];
+      empty?: unknown;
+    };
+  };
+  responses: never;
+  parameters: never;
+  requestBodies: never;
+  headers: never;
+  pathItems: never;
 }
 export type $defs = Record<string, never>;
 export interface operations {
-    getTest: {
-        parameters: {
-            query?: never;
-            header?: never;
-            path?: never;
-            cookie?: never;
+  getTest: {
+    parameters: {
+      query?: never;
+      header?: never;
+      path?: never;
+      cookie?: never;
+    };
+    requestBody?: never;
+    responses: {
+      /** @description 200 */
+      200: {
+        headers: {
+          [name: string]: unknown;
+        };
+        content: {
+          "application/json": [
+            string
+          ];
         };
-        requestBody?: never;
-        responses: {
-            /** @description 200 */
-            200: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content: {
-                    "application/json": [
-                        string
-                    ];
-                };
-            };
-            /** @description An error response */
-            400: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content?: never;
-            };
+      };
+      /** @description An error response */
+      400: {
+        headers: {
+          [name: string]: unknown;
         };
+        content?: never;
+      };
+    };
+  };
+  listPets: {
+    parameters: {
+      query?: {
+        /** @description How many items to return at one time (max 100) */
+        limit?: number;
+      };
+      header?: never;
+      path?: never;
+      cookie?: never;
     };
-    listPets: {
-        parameters: {
-            query?: {
-                /** @description How many items to return at one time (max 100) */
-                limit?: number;
-            };
-            header?: never;
-            path?: never;
-            cookie?: never;
+    requestBody?: never;
+    responses: {
+      /** @description A paged array of pets */
+      200: {
+        headers: {
+          [name: string]: unknown;
         };
-        requestBody?: never;
-        responses: {
-            /** @description A paged array of pets */
-            200: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content: {
-                    "application/json": components["schemas"]["Pets"];
-                };
-            };
-            /** @description An error response */
-            400: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content?: never;
-            };
+        content: {
+          "application/json": Pets;
         };
+      };
+      /** @description An error response */
+      400: {
+        headers: {
+          [name: string]: unknown;
+        };
+        content?: never;
+      };
+    };
+  };
+  listPetsModel: {
+    parameters: {
+      query?: {
+        /** @description How many items to return at one time (max 100) */
+        limit?: number;
+      };
+      header?: never;
+      path?: never;
+      cookie?: never;
     };
-    listPetsModel: {
-        parameters: {
-            query?: {
-                /** @description How many items to return at one time (max 100) */
-                limit?: number;
-            };
-            header?: never;
-            path?: never;
-            cookie?: never;
+    requestBody?: never;
+    responses: {
+      /** @description A paged array of model */
+      200: {
+        headers: {
+          [name: string]: unknown;
         };
-        requestBody?: never;
-        responses: {
-            /** @description A paged array of model */
-            200: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content: {
-                    "application/json": components["schemas"]["Model"];
-                };
-            };
-            /** @description An error response */
-            400: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content?: never;
-            };
+        content: {
+          "application/json": Model;
         };
+      };
+      /** @description An error response */
+      400: {
+        headers: {
+          [name: string]: unknown;
+        };
+        content?: never;
+      };
+    };
+  };
+  listPetsPerson: {
+    parameters: {
+      query?: {
+        /** @description How many items to return at one time (max 100) */
+        limit?: number;
+      };
+      header?: never;
+      path?: never;
+      cookie?: never;
     };
-    listPetsPerson: {
-        parameters: {
-            query?: {
-                /** @description How many items to return at one time (max 100) */
-                limit?: number;
-            };
-            header?: never;
-            path?: never;
-            cookie?: never;
+    requestBody?: never;
+    responses: {
+      /** @description A paged array of person */
+      200: {
+        headers: {
+          [name: string]: unknown;
         };
-        requestBody?: never;
-        responses: {
-            /** @description A paged array of person */
-            200: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content: {
-                    "application/json": components["schemas"]["person"];
-                };
-            };
-            /** @description An error response */
-            400: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content?: never;
-            };
+        content: {
+          "application/json": person;
         };
-    };
-    getEmptyOperationId: {
-        parameters: {
-            query?: never;
-            header?: never;
-            path?: never;
-            cookie?: never;
+      };
+      /** @description An error response */
+      400: {
+        headers: {
+          [name: string]: unknown;
         };
-        requestBody?: never;
-        responses: never;
+        content?: never;
+      };
+    };
+  };
+  getEmptyOperationId: {
+    parameters: {
+      query?: never;
+      header?: never;
+      path?: never;
+      cookie?: never;
     };
-    getUnevaluatedProperties: {
-        parameters: {
-            query?: never;
-            header?: never;
-            path?: never;
-            cookie?: never;
+    requestBody?: never;
+    responses: never;
+  };
+  getUnevaluatedProperties: {
+    parameters: {
+      query?: never;
+      header?: never;
+      path?: never;
+      cookie?: never;
+    };
+    requestBody?: never;
+    responses: {
+      /** @description OK */
+      200: {
+        headers: {
+          [name: string]: unknown;
         };
-        requestBody?: never;
-        responses: {
-            /** @description OK */
-            200: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content: {
-                    "application/json": {
-                        foo?: string;
-                    } & {
-                        bar?: number;
-                    };
-                };
-            };
-            /** @description An error response */
-            400: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content?: never;
-            };
+        content: {
+          "application/json": {
+            foo?: string;
+          } & {
+            bar?: number;
+          };
         };
-    };
-    editPet: {
-        parameters: {
-            query?: never;
-            header?: never;
-            path?: never;
-            cookie?: never;
+      };
+      /** @description An error response */
+      400: {
+        headers: {
+          [name: string]: unknown;
         };
-        requestBody?: {
-            content: {
-                "application/octet-stream": unknown;
-            };
+        content?: never;
+      };
+    };
+  };
+  editPet: {
+    parameters: {
+      query?: never;
+      header?: never;
+      path?: never;
+      cookie?: never;
+    };
+    requestBody?: {
+      content: {
+        "application/octet-stream": unknown;
+      };
+    };
+    responses: {
+      /** @description Return a 200 status to indicate that the data was received successfully */
+      200: {
+        headers: {
+          [name: string]: unknown;
         };
-        responses: {
-            /** @description Return a 200 status to indicate that the data was received successfully */
-            200: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content?: never;
-            };
-            /** @description An error response */
-            400: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content?: never;
-            };
+        content?: never;
+      };
+      /** @description An error response */
+      400: {
+        headers: {
+          [name: string]: unknown;
         };
+        content?: never;
+      };
     };
-    addPet: {
-        parameters: {
-            query?: never;
-            header?: never;
-            path?: never;
-            cookie?: never;
+  };
+  addPet: {
+    parameters: {
+      query?: never;
+      header?: never;
+      path?: never;
+      cookie?: never;
+    };
+    /** @description Information about a new pet in the system */
+    requestBody?: {
+      content: {
+        "multipart/form-data": {
+          orderId?: number;
+          fileName?: string;
         };
-        /** @description Information about a new pet in the system */
-        requestBody?: {
-            content: {
-                "multipart/form-data": {
-                    orderId?: number;
-                    fileName?: string;
-                };
-            };
+      };
+    };
+    responses: {
+      /** @description Return a 200 status to indicate that the data was received successfully */
+      200: {
+        headers: {
+          [name: string]: unknown;
         };
-        responses: {
-            /** @description Return a 200 status to indicate that the data was received successfully */
-            200: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content?: never;
-            };
-            /** @description Invalid input */
-            405: {
-                headers: {
-                    [name: string]: unknown;
-                };
-                content?: never;
-            };
+        content?: never;
+      };
+      /** @description Invalid input */
+      405: {
+        headers: {
+          [name: string]: unknown;
         };
+        content?: never;
+      };
     };
+  };
 }