import { SimpleChanges } from '@angular/core';
import { ElementRef, OnChanges } from '@angular/core';
import * as i0 from "@angular/core";
export declare class AutocompleteKeyboardNavigationActivateOptionDirective implements OnChanges {
    private elementRef;
    singAutocompleteKeyboardNavigationActivateOption: boolean;
    constructor(elementRef: ElementRef);
    ngOnChanges(changes: SimpleChanges): void;
    /**
     * set the current mat option as active also scroll the option into view
     */
    private setActivate;
    static ɵfac: i0.ɵɵFactoryDeclaration<AutocompleteKeyboardNavigationActivateOptionDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<AutocompleteKeyboardNavigationActivateOptionDirective, "[singAutocompleteKeyboardNavigationActivateOption]", never, { "singAutocompleteKeyboardNavigationActivateOption": "singAutocompleteKeyboardNavigationActivateOption"; }, {}, never, never, false, never>;
}
//# sourceMappingURL=autocomplete-keyboard-navigation-activate-option.directive.d.ts.map