cra-template-rb/template/internals/startingTemplate/src/types/RootState.ts

The official React Boilerplate template for Create React App

// [IMPORT NEW CONTAINERSTATE ABOVE] < Needed for generating containers seamlessly

/* 
  Because the redux-injectors injects your reducers asynchronously somewhere in your code
  You have to declare them here manually
*/
export interface RootState {
  // [INSERT NEW REDUCER KEY ABOVE] < Needed for generating containers seamlessly
}