extract-return.js

//@flow

export type ExtractReturn<Fn> = $Call<<T>((...Iterable<any>) => T) => T, Fn>;

//example

const mapDispatchToProps = (dispatch: Dispatch) => ({
  actions: {
    setCompany: ({ companyId, domainName }) =>
      dispatch(
        setCompany({
          companyId,
          domainName,
        }),
      ),
  },
});

type ReduxActions = ExtractReturn<typeof mapDispatchToProps>;