/// <reference types="zen-observable" />
import type { FetchResult, Operation } from '@apollo/client/core';
import { Observable } from '@apollo/client/utilities';
import type { DocumentNode } from 'graphql';
import { GraphQLError } from 'graphql';
import type { LocalFederationService } from './LocalFederationService';
import type { DocumentInfo } from './distributeQuery';
export declare class ResolutionStrategy {
    private query;
    protected initialDocuments: Set<DocumentInfo>;
    protected extensionDocuments: Map<string, DocumentInfo>;
    protected distributionErrors: Array<GraphQLError>;
    deltaQuery: DocumentNode | null;
    constructor(query: DocumentNode, services: Array<LocalFederationService>);
    private calculateDeltaQuery;
    protected executeInitial(operation: Operation, isSubscription: boolean): Observable<FetchResult> | null;
    protected executeRest(rootData: FetchResult, operation: Operation): Promise<FetchResult>;
    execute(operation: Operation): Observable<FetchResult>;
}