import { QueryList } from '@angular/core';
import { SelectSize } from '../select/select.types';
export declare function _countGroupLabelsBeforeOption(optionIndex: number, options: QueryList<any>, optionGroups: QueryList<any>): number;
export declare function _getOptionScrollPosition(optionIndex: number, optionHeight: number, currentScrollPosition: number, panelHeight: number): number;
export declare function _scrollToOption({ size, panel, options, groups, activeItemIndex }: {
    size: any;
    panel: any;
    options: any;
    groups: any;
    activeItemIndex: any;
}): void;
export declare function getSelectOptionHeight(size: SelectSize): number;