import type { ApolloQueryResult, FetchResult, OperationVariables, QueryOptions, SubscriptionOptions } from '@apollo/client/core';
import { Apollo } from 'apollo-angular';
import type { EmptyObject, ExtraSubscriptionOptions, MutationOptions, MutationResult, WatchQueryOptions } from 'apollo-angular/types';
import { Observable } from 'rxjs';
import { NgGqlConfig } from '../models';
import * as i0 from "@angular/core";
export declare class ApolloService {
    private _apollo;
    private _config;
    constructor(_apollo: Apollo, _config: NgGqlConfig);
    watchQuery<TData, TVariables extends OperationVariables = EmptyObject>(options: WatchQueryOptions<TVariables, TData>): Observable<ApolloQueryResult<TData>>;
    query<T, V = EmptyObject>(options: QueryOptions<V, T>): Observable<ApolloQueryResult<T>>;
    mutate<T, V = EmptyObject>(options: MutationOptions<T, V>): Observable<MutationResult<T>>;
    subscribe<T, V = EmptyObject>(options: SubscriptionOptions<V, T>, extra?: ExtraSubscriptionOptions): Observable<FetchResult<T>>;
    static ɵfac: i0.ɵɵFactoryDeclaration<ApolloService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ApolloService>;
}