import { ElementRef } from '@angular/core';
import * as i0 from "@angular/core";
export declare class LettersOnlyDirective {
    private el;
    constructor(el: ElementRef);
    onInputChange(event: Event): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<LettersOnlyDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<LettersOnlyDirective, "[simpoLettersOnly]", never, {}, {}, never, never, true, never>;
}
