/**
 * the selected state instance.
 * NOTE: selectAll and unselectAll are not allowed to be true at the same time.
 */
import { DropDownSelectedState } from '../models/drop-down-selected-state.interface';
import { DropDownItem } from '../models/drop-down-item.interface';
export declare class SelectedState implements DropDownSelectedState {
    private readonly _selectAll;
    get selectAll(): boolean;
    private readonly _unselectAll;
    get unselectAll(): boolean;
    /**
     * keep the selected item as a map object
     * where the key is item value and value is the selected dropdown item
     */
    selectedItemsMap: Record<string, DropDownItem>;
    unselectedItemsMap: Record<string, DropDownItem>;
    constructor(selectAll?: boolean, unselectAll?: boolean);
}
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