Remove maybe types

src/connection/arrayconnection.js

@@ -139,7 +139,7 @@ export function cursorToOffset(cursor: ConnectionCursor): number {
 export function cursorForObjectInConnection<T>(
   data: $ReadOnlyArray<T>,
   object: T,
-): ?ConnectionCursor {
+): ConnectionCursor | null {
   const offset = data.indexOf(object);
   if (offset === -1) {
     return null;
@@ -153,7 +153,7 @@ export function cursorForObjectInConnection<T>(
  * otherwise it will be the default.
  */
 export function getOffsetWithDefault(
-  cursor?: ?ConnectionCursor,
+  cursor: ConnectionCursor | void | null,
   defaultOffset: number,
 ): number {
   if (typeof cursor !== 'string') {

src/connection/connection.js

@@ -52,12 +52,12 @@ export const connectionArgs: GraphQLFieldConfigArgumentMap = {
 };
 
 type ConnectionConfig = {
-  name?: ?string,
+  name?: string,
   nodeType: GraphQLObjectType,
-  resolveNode?: ?GraphQLFieldResolver<any, any>,
-  resolveCursor?: ?GraphQLFieldResolver<any, any>,
-  edgeFields?: ?Thunk<GraphQLFieldConfigMap<any, any>>,
-  connectionFields?: ?Thunk<GraphQLFieldConfigMap<any, any>>,
+  resolveNode?: GraphQLFieldResolver<any, any>,
+  resolveCursor?: GraphQLFieldResolver<any, any>,
+  edgeFields?: Thunk<GraphQLFieldConfigMap<any, any>>,
+  connectionFields?: Thunk<GraphQLFieldConfigMap<any, any>>,
 };
 
 type GraphQLConnectionDefinitions = {

src/connection/connectiontypes.js

@@ -9,10 +9,10 @@ export type ConnectionCursor = string;
  * A flow type designed to be exposed as `PageInfo` over GraphQL.
  */
 export type PageInfo = {
-  startCursor: ?ConnectionCursor,
-  endCursor: ?ConnectionCursor,
-  hasPreviousPage: ?boolean,
-  hasNextPage: ?boolean,
+  startCursor: ConnectionCursor | null,
+  endCursor: ConnectionCursor | null,
+  hasPreviousPage: boolean,
+  hasNextPage: boolean,
 };
 
 /**
@@ -35,9 +35,9 @@ export type Edge<T> = {
  * A flow type describing the arguments a connection field receives in GraphQL.
  */
 export type ConnectionArguments = {
-  before?: ?ConnectionCursor,
-  after?: ?ConnectionCursor,
-  first?: ?number,
-  last?: ?number,
+  before?: ConnectionCursor | null,
+  after?: ConnectionCursor | null,
+  first?: number | null,
+  last?: number | null,
   ...
 };

src/node/node.js

@@ -33,7 +33,7 @@ type GraphQLNodeDefinitions<TContext> = {
  */
 export function nodeDefinitions<TContext>(
   idFetcher: (id: string, context: TContext, info: GraphQLResolveInfo) => any,
-  typeResolver?: ?GraphQLTypeResolver<any, TContext>,
+  typeResolver?: GraphQLTypeResolver<any, TContext>,
 ): GraphQLNodeDefinitions<TContext> {
   const nodeInterface = new GraphQLInterfaceType({
     name: 'Node',
@@ -110,7 +110,7 @@ export function fromGlobalId(globalId: string): ResolvedGlobalId {
  * property on the object.
  */
 export function globalIdField(
-  typeName?: ?string,
+  typeName?: string,
   idFetcher?: (object: any, context: any, info: GraphQLResolveInfo) => string,
 ): GraphQLFieldConfig<any, mixed> {
   return {

src/node/plural.js

@@ -17,8 +17,8 @@ type PluralIdentifyingRootFieldConfig = {
     input: any,
     context: any,
     info: GraphQLResolveInfo,
-  ) => ?any,
-  description?: ?string,
+  ) => any,
+  description?: string,
 };
 
 export function pluralIdentifyingRootField(