import { PipeTransform } from '@angular/core';
import { Observable } from 'rxjs';
import { PreviewService } from './beta-preview.service';
import * as i0 from "@angular/core";
export declare class FeatureStatePipe implements PipeTransform {
    private previewService;
    constructor(previewService: PreviewService);
    transform(featureKey: string): Observable<boolean>;
    static ɵfac: i0.ɵɵFactoryDeclaration<FeatureStatePipe, never>;
    static ɵpipe: i0.ɵɵPipeDeclaration<FeatureStatePipe, "featureState", true>;
}
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