import { ElementRef, OnChanges, SimpleChanges } from '@angular/core';
import { MatTooltip } from '@angular/material/tooltip';
import * as i0 from "@angular/core";
export declare const DISABLE_AUTO_ACCESSIBLE_LABEL_ATTRIBUTE = "disable-auto-accessible-label";
export declare const MAT_TOOLTIP_MISSING_WARNING: string;
export declare class UiAutoAccessibleLabelDirective implements OnChanges {
    private _elementRef;
    matTooltip?: string;
    constructor(_elementRef: ElementRef<HTMLUnknownElement>, tooltip?: MatTooltip);
    ngOnChanges(changes: SimpleChanges): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<UiAutoAccessibleLabelDirective, [null, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<UiAutoAccessibleLabelDirective, " [mat-fab]:not([disable-auto-accessible-label]),                [mat-mini-fab]:not([disable-auto-accessible-label]),                [mat-icon-button]:not([disable-auto-accessible-label]),                mat-icon:not([disable-auto-accessible-label])", never, { "matTooltip": "matTooltip"; }, {}, never, never, false, never>;
}