import { AbstractControl, AsyncValidator, ValidationErrors } from '@angular/forms';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class AsyncFunctionValidatorDirective implements AsyncValidator {
    aclAsyncValidateFn: (control: AbstractControl) => Promise<ValidationErrors | null> | Observable<ValidationErrors | null>;
    onValidatorChange: () => void;
    validate(control: AbstractControl): Promise<ValidationErrors | null> | Observable<ValidationErrors | null>;
    registerOnValidatorChange(fn: () => void): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<AsyncFunctionValidatorDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<AsyncFunctionValidatorDirective, "[aclAsyncValidateFn][ngModel],[aclAsyncValidateFn][formControl],[aclAsyncValidateFn][formControlName]", never, { "aclAsyncValidateFn": "aclAsyncValidateFn"; }, {}, never, never, false>;
}
