import { ChangeDetectorRef, OnDestroy, PipeTransform } from '@angular/core';
import { NgxAuthenticationAbstractService } from '../../abstracts';
import * as i0 from "@angular/core";
/**
 * A pipe that returns whether a (list of) feature(s) has been provided
 */
export declare class NgxHasFeaturePipe<FeatureType extends string> implements PipeTransform, OnDestroy {
    private readonly authenticationService;
    private readonly cdRef;
    /**
     * Subject to hold the destroyed state of the current observable
     */
    private destroyed$;
    /**
     * The latest value of the Observable, whether or not the feature is provided
     */
    private hasFeature;
    /**
     * Instance of the change detector ref, implemented like this according to the async pipe implementation
     * https://github.com/angular/angular/blob/main/packages/common/src/pipes/async_pipe.ts
     */
    private changeDetectorRef;
    constructor(authenticationService: NgxAuthenticationAbstractService, cdRef: ChangeDetectorRef);
    ngOnDestroy(): void;
    /**
     * Returns whether or not a feature is provided for the environment
     *
     * @param feature - The provided feature
     */
    transform(feature: FeatureType | FeatureType[]): boolean;
    /**
     * Handles the changeDetection, latest value and dispose of the hasFeature observable
     *
     * @param observable - The hasFeature observable
     */
    private subscribe;
    /**
     * Dispose of the feature observable when existing
     */
    private dispose;
    static ɵfac: i0.ɵɵFactoryDeclaration<NgxHasFeaturePipe<any>, never>;
    static ɵpipe: i0.ɵɵPipeDeclaration<NgxHasFeaturePipe<any>, "ngxHasFeature", true>;
}