import { OnChanges, OnDestroy, SimpleChanges } from '@angular/core';
export declare class NtFormLabelWidthDirective implements OnChanges, OnDestroy {
    private readonly _widthChange;
    private _width;
    get width(): number;
    set width(value: number);
    get widthChange(): import("rxjs").Observable<number>;
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
}
