/// <reference types="zen-observable" />
import { ApolloLink, Observable } from '@apollo/client/core';
import type { FetchResult, NextLink, Operation } from '@apollo/client/core';
import type { EnumApolloLinkArgs } from './types';
export default class EnumApolloLink extends ApolloLink {
    private readonly serializer;
    private readonly parser;
    constructor({ schema, serializer, parser, enumValueMap, valueFormat }: EnumApolloLinkArgs);
    request(givenOperation: Operation, forward: NextLink): Observable<FetchResult> | null;
    private pipeOperation;
    private pipeResult;
    private resolveFragments;
}