/**
 * @packageDocumentation
 * @module utils
 */
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class FeatureGateService {
    private readonly http;
    private readonly cacheStore;
    constructor(http: HttpClient);
    loadState(cluster?: string): Observable<"loaded" | "loadFailed" | "loading">;
    /**
     * check gate status
     * @param gate - specified feature gate
     * @param cluster - check gate for specified cluster
     */
    isEnabled(gateName: string, cluster?: string): Observable<boolean>;
    isNegateEnabled(gateName: string, cluster?: string): Observable<boolean>;
    /**
     * filter list with gate, send items without feature gate as begin push (can skip by passing `skipNoFeatureGatePush` argument with true)
     * @param items - list need filter
     * @param gateAccessor - how to get gate from item
     * @param cluster - check gate for specified cluster
     * @param filterMethod - filter method, default to list filter, can filter deep with createRecursiveFilter or totally custom method.
     * @param skipNoFeatureGatePush - skip begin push , default false.
     */
    filterEnabled<T>(items: T[], gateAccessor: (item: T) => string, cluster?: string, filterMethod?: (items: T[], condition: (item: T) => boolean) => T[], skipNoFeatureGatePush?: boolean): Observable<T[]>;
    /**
     * refetch cached feature gate settings
     * @param cluster - specified cluster, refetch all already cached settings when cluster is empty
     */
    refetchCache(cluster?: string): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<FeatureGateService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<FeatureGateService>;
}