Major Changes #12384 6aa6fd3 Thanks @jerelmiller! - Remove the asyncMap utility function. Instead use one of the RxJS operators that creates Observables from promises, such as from. #12398 8cf5077 Thanks @jerelmiller! - Removes the isApolloError utility function to check if the error object is an ApolloError instance. Use instanceof to check for more specific error types that replace ApolloError.