import { SimpleChanges, OnChanges } from '@angular/core';
import { AbstractControl, Validator, AsyncValidatorFn } from '@angular/forms';
import { Observable } from 'rxjs';
import { UserService } from 'ngx-login-client';
import { SpaceService } from './space.service';
export declare class UniqueSpaceNameValidatorDirective implements Validator, OnChanges {
    private spaceService;
    private userService;
    uniqueSpaceName: boolean;
    private valFn;
    constructor(spaceService: SpaceService, userService: UserService);
    ngOnChanges(changes: SimpleChanges): void;
    validate(control: AbstractControl): Observable<{
        [key: string]: any;
    }>;
}
export declare function uniqueSpaceNameValidator(spaceService: SpaceService, userService: UserService): AsyncValidatorFn;