diff --git a/__tests__/core/model.test.ts b/__tests__/core/model.test.ts
index 95d542c4f..4979c01b9 100644
--- a/__tests__/core/model.test.ts
+++ b/__tests__/core/model.test.ts
@@ -85,6 +85,18 @@ describe("Model instantiation", () => {
 
       expect(Model.properties).toEqual({})
     })
+    test("Model should not mutate properties object", () => {
+      const properties = {
+        prop1: "prop1",
+        prop2: 2
+      }
+      const Model = types.model("name", properties)
+
+      expect(properties).toEqual({
+        prop1: "prop1",
+        prop2: 2
+      })
+    })
   })
   describe("Model identifier", () => {
     test("If no identifier attribute is provided, the identifierAttribute should be undefined.", () => {
diff --git a/src/types/complex-types/model.ts b/src/types/complex-types/model.ts
index d1a25f621..b7b08e7fa 100644
--- a/src/types/complex-types/model.ts
+++ b/src/types/complex-types/model.ts
@@ -81,20 +81,20 @@ export interface ModelPropertiesDeclaration {
  */
 export type ModelPropertiesDeclarationToProperties<T extends ModelPropertiesDeclaration> =
   T extends { [k: string]: IAnyType } // optimization to reduce nesting
-    ? T
-    : {
-        [K in keyof T]: T[K] extends IAnyType // keep IAnyType check on the top to reduce nesting
-          ? T[K]
-          : T[K] extends string
-          ? IType<string | undefined, string, string>
-          : T[K] extends number
-          ? IType<number | undefined, number, number>
-          : T[K] extends boolean
-          ? IType<boolean | undefined, boolean, boolean>
-          : T[K] extends Date
-          ? IType<number | Date | undefined, number, Date>
-          : never
-      }
+  ? T
+  : {
+    [K in keyof T]: T[K] extends IAnyType // keep IAnyType check on the top to reduce nesting
+    ? T[K]
+    : T[K] extends string
+    ? IType<string | undefined, string, string>
+    : T[K] extends number
+    ? IType<number | undefined, number, number>
+    : T[K] extends boolean
+    ? IType<boolean | undefined, boolean, boolean>
+    : T[K] extends Date
+    ? IType<number | Date | undefined, number, Date>
+    : never
+  }
 
 /**
  * Checks if a value is optional (undefined, any or unknown).
@@ -138,13 +138,13 @@ type WithAdditionalProperties<T> = T extends Record<string, never> ? Record<stri
 /** @hidden */
 export type ModelCreationType2<P extends ModelProperties, CustomC> = keyof P extends never
   ? // When there are no props, we want to prevent passing in any object. We have two objects we want to allow:
-    //  1. The empty object
-    //  2. An instance of this model
-    //
-    // The `IStateTreeNode` interface allows both. For (1), these props are optional so an empty object is allowed.
-    // For (2), an instance will contain these two props, including the "secret" `$stateTreeNodeType` prop. TypeScript's
-    // excess property checking will then ensure no other props are passed in.
-    IStateTreeNode
+  //  1. The empty object
+  //  2. An instance of this model
+  //
+  // The `IStateTreeNode` interface allows both. For (1), these props are optional so an empty object is allowed.
+  // For (2), an instance will contain these two props, including the "secret" `$stateTreeNodeType` prop. TypeScript's
+  // excess property checking will then ensure no other props are passed in.
+  IStateTreeNode
   : _CustomOrOther<CustomC, ModelCreationType<ExtractCFromProps<P>>>
 
 /** @hidden */
@@ -183,10 +183,10 @@ export interface IModelType<
   CustomC = _NotCustomized,
   CustomS = _NotCustomized
 > extends IType<
-    ModelCreationType2<PROPS, CustomC>,
-    ModelSnapshotType2<PROPS, CustomS>,
-    ModelInstanceType<PROPS, OTHERS>
-  > {
+  ModelCreationType2<PROPS, CustomC>,
+  ModelSnapshotType2<PROPS, CustomS>,
+  ModelInstanceType<PROPS, OTHERS>
+> {
   readonly properties: PROPS
 
   named(newName: string): IModelType<PROPS, OTHERS, CustomC, CustomS>
@@ -225,7 +225,7 @@ export interface IModelType<
 /**
  * Any model type.
  */
-export interface IAnyModelType extends IModelType<any, any, any, any> {}
+export interface IAnyModelType extends IModelType<any, any, any, any> { }
 
 /** @hidden */
 export type ExtractProps<T extends IAnyModelType> = T extends IModelType<infer P, any, any, any>
@@ -324,7 +324,7 @@ function toPropertiesObject(declaredProps: ModelPropertiesDeclaration): ModelPro
     }
 
     return props
-  }, declaredProps as any)
+  }, { ...declaredProps } as any)
 }
 
 /**
@@ -332,19 +332,18 @@ function toPropertiesObject(declaredProps: ModelPropertiesDeclaration): ModelPro
  * @hidden
  */
 export class ModelType<
-    PROPS extends ModelProperties,
-    OTHERS,
-    CustomC,
-    CustomS,
-    MT extends IModelType<PROPS, OTHERS, CustomC, CustomS>
-  >
+  PROPS extends ModelProperties,
+  OTHERS,
+  CustomC,
+  CustomS,
+  MT extends IModelType<PROPS, OTHERS, CustomC, CustomS>
+>
   extends ComplexType<
     ModelCreationType2<PROPS, CustomC>,
     ModelSnapshotType2<PROPS, CustomS>,
     ModelInstanceType<PROPS, OTHERS>
   >
-  implements IModelType<PROPS, OTHERS, CustomC, CustomS>
-{
+  implements IModelType<PROPS, OTHERS, CustomC, CustomS> {
   readonly flags = TypeFlags.Object
 
   /*
@@ -438,8 +437,8 @@ export class ModelType<
       const actionInvoker = createActionInvoker(self as any, name, boundAction)
       actions[name] = actionInvoker
 
-      // See #646, allow models to be mocked
-      ;(!devMode() ? addHiddenFinalProp : addHiddenWritableProp)(self, name, actionInvoker)
+        // See #646, allow models to be mocked
+        ; (!devMode() ? addHiddenFinalProp : addHiddenWritableProp)(self, name, actionInvoker)
     })
   }
 
@@ -514,7 +513,7 @@ export class ModelType<
       } else if (typeof descriptor.value === "function") {
         // this is a view function, merge as is!
         // See #646, allow models to be mocked
-        ;(!devMode() ? addHiddenFinalProp : addHiddenWritableProp)(self, key, descriptor.value)
+        ; (!devMode() ? addHiddenFinalProp : addHiddenWritableProp)(self, key, descriptor.value)
       } else {
         throw new MstError(`A view member should either be a function or getter based property`)
       }
@@ -644,7 +643,7 @@ export class ModelType<
       try {
         // TODO: FIXME, make sure the observable ref is used!
         const atom = getAtom(node.storedValue, name)
-        ;(atom as any).reportObserved()
+          ; (atom as any).reportObserved()
       } catch (e) {
         throw new MstError(`${name} property is declared twice`)
       }
@@ -668,14 +667,14 @@ export class ModelType<
     if (!(patch.op === "replace" || patch.op === "add")) {
       throw new MstError(`object does not support operation ${patch.op}`)
     }
-    ;(node.storedValue as any)[subpath] = patch.value
+    ; (node.storedValue as any)[subpath] = patch.value
   }
 
   applySnapshot(node: this["N"], snapshot: this["C"]): void {
     typecheckInternal(this, snapshot)
     const preProcessedSnapshot = this.applySnapshotPreProcessor(snapshot)
     this.forAllProps((name) => {
-      ;(node.storedValue as any)[name] = preProcessedSnapshot[name]
+      ; (node.storedValue as any)[name] = preProcessedSnapshot[name]
     })
   }
 
@@ -731,7 +730,7 @@ export class ModelType<
   }
 
   removeChild(node: this["N"], subpath: string) {
-    ;(node.storedValue as any)[subpath] = undefined
+    ; (node.storedValue as any)[subpath] = undefined
   }
 }
 ModelType.prototype.applySnapshot = action(ModelType.prototype.applySnapshot)
@@ -782,32 +781,32 @@ export function compose<PA extends ModelProperties, OA, FCA, FSA, PB extends Mod
 export function compose<PA extends ModelProperties, OA, FCA, FSA, PB extends ModelProperties, OB, FCB, FSB, PC extends ModelProperties, OC, FCC, FSC, PD extends ModelProperties, OD, FCD, FSD, PE extends ModelProperties, OE, FCE, FSE>(name: string, A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>): IModelType<PA & PB & PC & PD & PE, OA & OB & OC & OD & OE, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, FCE>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, FSE>>>>>
 // prettier-ignore
 export function compose<PA extends ModelProperties, OA, FCA, FSA, PB extends ModelProperties, OB, FCB, FSB, PC extends ModelProperties, OC, FCC, FSC, PD extends ModelProperties, OD, FCD, FSD, PE extends ModelProperties, OE, FCE, FSE>(A:
-    IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>): IModelType<PA & PB & PC & PD & PE, OA & OB & OC & OD & OE, _CustomJoin<FCA,
-        _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, FCE>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, FSE>>>>>
+  IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>): IModelType<PA & PB & PC & PD & PE, OA & OB & OC & OD & OE, _CustomJoin<FCA,
+    _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, FCE>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, FSE>>>>>
 // prettier-ignore
 export function compose<PA extends ModelProperties, OA, FCA, FSA, PB extends ModelProperties, OB, FCB, FSB, PC extends ModelProperties, OC, FCC, FSC, PD extends ModelProperties, OD, FCD, FSD, PE extends ModelProperties, OE, FCE, FSE, PF
-    extends ModelProperties, OF, FCF, FSF>(name: string, A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>): IModelType<PA & PB & PC & PD & PE & PF, OA & OB & OC & OD & OE & OF, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, FCF>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, FSF>>>>>>
+  extends ModelProperties, OF, FCF, FSF>(name: string, A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>): IModelType<PA & PB & PC & PD & PE & PF, OA & OB & OC & OD & OE & OF, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, FCF>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, FSF>>>>>>
 // prettier-ignore
 export function compose<PA extends ModelProperties, OA, FCA, FSA, PB extends ModelProperties, OB, FCB, FSB, PC extends ModelProperties, OC, FCC, FSC, PD extends ModelProperties, OD, FCD, FSD, PE extends ModelProperties, OE, FCE, FSE, PF
-    extends ModelProperties, OF, FCF, FSF>(A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>): IModelType<PA & PB & PC & PD & PE & PF, OA & OB & OC & OD & OE & OF, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, FCF>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, FSF>>>>>>
+  extends ModelProperties, OF, FCF, FSF>(A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>): IModelType<PA & PB & PC & PD & PE & PF, OA & OB & OC & OD & OE & OF, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, FCF>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, FSF>>>>>>
 // prettier-ignore
 export function compose<PA extends ModelProperties, OA, FCA, FSA, PB extends ModelProperties, OB, FCB, FSB, PC extends ModelProperties, OC, FCC, FSC, PD extends ModelProperties, OD, FCD, FSD, PE extends ModelProperties, OE, FCE, FSE, PF
-    extends ModelProperties, OF, FCF, FSF, PG extends ModelProperties, OG, FCG, FSG>(name: string, A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>, G: IModelType<PG, OG, FCG, FSG>): IModelType<PA & PB & PC & PD & PE & PF & PG, OA & OB & OC & OD & OE & OF & OG, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, _CustomJoin<FCF, FCG>>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, _CustomJoin<FSF, FSG>>>>>>>
+  extends ModelProperties, OF, FCF, FSF, PG extends ModelProperties, OG, FCG, FSG>(name: string, A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>, G: IModelType<PG, OG, FCG, FSG>): IModelType<PA & PB & PC & PD & PE & PF & PG, OA & OB & OC & OD & OE & OF & OG, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, _CustomJoin<FCF, FCG>>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, _CustomJoin<FSF, FSG>>>>>>>
 // prettier-ignore
 export function compose<PA extends ModelProperties, OA, FCA, FSA, PB extends ModelProperties, OB, FCB, FSB, PC extends ModelProperties, OC, FCC, FSC, PD extends ModelProperties, OD, FCD, FSD, PE extends ModelProperties, OE, FCE, FSE, PF
-    extends ModelProperties, OF, FCF, FSF, PG extends ModelProperties, OG, FCG, FSG>(A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>, G: IModelType<PG, OG, FCG, FSG>): IModelType<PA & PB & PC & PD & PE & PF & PG, OA & OB & OC & OD & OE & OF & OG, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, _CustomJoin<FCF, FCG>>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, _CustomJoin<FSF, FSG>>>>>>>
+  extends ModelProperties, OF, FCF, FSF, PG extends ModelProperties, OG, FCG, FSG>(A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>, G: IModelType<PG, OG, FCG, FSG>): IModelType<PA & PB & PC & PD & PE & PF & PG, OA & OB & OC & OD & OE & OF & OG, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, _CustomJoin<FCF, FCG>>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, _CustomJoin<FSF, FSG>>>>>>>
 // prettier-ignore
 export function compose<PA extends ModelProperties, OA, FCA, FSA, PB extends ModelProperties, OB, FCB, FSB, PC extends ModelProperties, OC, FCC, FSC, PD extends ModelProperties, OD, FCD, FSD, PE extends ModelProperties, OE, FCE, FSE, PF
-    extends ModelProperties, OF, FCF, FSF, PG extends ModelProperties, OG, FCG, FSG, PH extends ModelProperties, OH, FCH, FSH>(name: string, A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>, G: IModelType<PG, OG, FCG, FSG>, H: IModelType<PH, OH, FCH, FSH>): IModelType<PA & PB & PC & PD & PE & PF & PG & PH, OA & OB & OC & OD & OE & OF & OG & OH, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, _CustomJoin<FCF, _CustomJoin<FCG, FCH>>>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, _CustomJoin<FSF, _CustomJoin<FSG, FSH>>>>>>>>
+  extends ModelProperties, OF, FCF, FSF, PG extends ModelProperties, OG, FCG, FSG, PH extends ModelProperties, OH, FCH, FSH>(name: string, A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>, G: IModelType<PG, OG, FCG, FSG>, H: IModelType<PH, OH, FCH, FSH>): IModelType<PA & PB & PC & PD & PE & PF & PG & PH, OA & OB & OC & OD & OE & OF & OG & OH, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, _CustomJoin<FCF, _CustomJoin<FCG, FCH>>>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, _CustomJoin<FSF, _CustomJoin<FSG, FSH>>>>>>>>
 // prettier-ignore
 export function compose<PA extends ModelProperties, OA, FCA, FSA, PB extends ModelProperties, OB, FCB, FSB, PC extends ModelProperties, OC, FCC, FSC, PD extends ModelProperties, OD, FCD, FSD, PE extends ModelProperties, OE, FCE, FSE, PF
-    extends ModelProperties, OF, FCF, FSF, PG extends ModelProperties, OG, FCG, FSG, PH extends ModelProperties, OH, FCH, FSH>(A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>, G: IModelType<PG, OG, FCG, FSG>, H: IModelType<PH, OH, FCH, FSH>): IModelType<PA & PB & PC & PD & PE & PF & PG & PH, OA & OB & OC & OD & OE & OF & OG & OH, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, _CustomJoin<FCF, _CustomJoin<FCG, FCH>>>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, _CustomJoin<FSF, _CustomJoin<FSG, FSH>>>>>>>>
+  extends ModelProperties, OF, FCF, FSF, PG extends ModelProperties, OG, FCG, FSG, PH extends ModelProperties, OH, FCH, FSH>(A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>, G: IModelType<PG, OG, FCG, FSG>, H: IModelType<PH, OH, FCH, FSH>): IModelType<PA & PB & PC & PD & PE & PF & PG & PH, OA & OB & OC & OD & OE & OF & OG & OH, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, _CustomJoin<FCF, _CustomJoin<FCG, FCH>>>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, _CustomJoin<FSF, _CustomJoin<FSG, FSH>>>>>>>>
 // prettier-ignore
 export function compose<PA extends ModelProperties, OA, FCA, FSA, PB extends ModelProperties, OB, FCB, FSB, PC extends ModelProperties, OC, FCC, FSC, PD extends ModelProperties, OD, FCD, FSD, PE extends ModelProperties, OE, FCE, FSE, PF
-    extends ModelProperties, OF, FCF, FSF, PG extends ModelProperties, OG, FCG, FSG, PH extends ModelProperties, OH, FCH, FSH, PI extends ModelProperties, OI, FCI, FSI>(name: string, A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>, G: IModelType<PG, OG, FCG, FSG>, H: IModelType<PH, OH, FCH, FSH>, I: IModelType<PI, OI, FCI, FSI>): IModelType<PA & PB & PC & PD & PE & PF & PG & PH & PI, OA & OB & OC & OD & OE & OF & OG & OH & OI, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, _CustomJoin<FCF, _CustomJoin<FCG, _CustomJoin<FCH, FCI>>>>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, _CustomJoin<FSF, _CustomJoin<FSG, _CustomJoin<FSH, FSI>>>>>>>>>
+  extends ModelProperties, OF, FCF, FSF, PG extends ModelProperties, OG, FCG, FSG, PH extends ModelProperties, OH, FCH, FSH, PI extends ModelProperties, OI, FCI, FSI>(name: string, A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>, G: IModelType<PG, OG, FCG, FSG>, H: IModelType<PH, OH, FCH, FSH>, I: IModelType<PI, OI, FCI, FSI>): IModelType<PA & PB & PC & PD & PE & PF & PG & PH & PI, OA & OB & OC & OD & OE & OF & OG & OH & OI, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, _CustomJoin<FCF, _CustomJoin<FCG, _CustomJoin<FCH, FCI>>>>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, _CustomJoin<FSF, _CustomJoin<FSG, _CustomJoin<FSH, FSI>>>>>>>>>
 // prettier-ignore
 export function compose<PA extends ModelProperties, OA, FCA, FSA, PB extends ModelProperties, OB, FCB, FSB, PC extends ModelProperties, OC, FCC, FSC, PD extends ModelProperties, OD, FCD, FSD, PE extends ModelProperties, OE, FCE, FSE, PF
-    extends ModelProperties, OF, FCF, FSF, PG extends ModelProperties, OG, FCG, FSG, PH extends ModelProperties, OH, FCH, FSH, PI extends ModelProperties, OI, FCI, FSI>(A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>, G: IModelType<PG, OG, FCG, FSG>, H: IModelType<PH, OH, FCH, FSH>, I: IModelType<PI, OI, FCI, FSI>): IModelType<PA & PB & PC & PD & PE & PF & PG & PH & PI, OA & OB & OC & OD & OE & OF & OG & OH & OI, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, _CustomJoin<FCF, _CustomJoin<FCG, _CustomJoin<FCH, FCI>>>>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, _CustomJoin<FSF, _CustomJoin<FSG, _CustomJoin<FSH, FSI>>>>>>>>>
+  extends ModelProperties, OF, FCF, FSF, PG extends ModelProperties, OG, FCG, FSG, PH extends ModelProperties, OH, FCH, FSH, PI extends ModelProperties, OI, FCI, FSI>(A: IModelType<PA, OA, FCA, FSA>, B: IModelType<PB, OB, FCB, FSB>, C: IModelType<PC, OC, FCC, FSC>, D: IModelType<PD, OD, FCD, FSD>, E: IModelType<PE, OE, FCE, FSE>, F: IModelType<PF, OF, FCF, FSF>, G: IModelType<PG, OG, FCG, FSG>, H: IModelType<PH, OH, FCH, FSH>, I: IModelType<PI, OI, FCI, FSI>): IModelType<PA & PB & PC & PD & PE & PF & PG & PH & PI, OA & OB & OC & OD & OE & OF & OG & OH & OI, _CustomJoin<FCA, _CustomJoin<FCB, _CustomJoin<FCC, _CustomJoin<FCD, _CustomJoin<FCE, _CustomJoin<FCF, _CustomJoin<FCG, _CustomJoin<FCH, FCI>>>>>>>>, _CustomJoin<FSA, _CustomJoin<FSB, _CustomJoin<FSC, _CustomJoin<FSD, _CustomJoin<FSE, _CustomJoin<FSF, _CustomJoin<FSG, _CustomJoin<FSH, FSI>>>>>>>>>
 
 /**
  * `types.compose` - Composes a new model from one or more existing model types.