import { UnitConfig } from '../models';
import { UnitBase } from './abstract-unit-base';
/**
 * BoolUnit is a reactive storage Unit that stores `boolean` value.
 *
 * It only accepts `boolean` data type as its value.
 * It ensures that at any point of time the value would always be `boolean`.
 *
 * Learn more about Units [here](https://docs.activejs.dev/fundamentals/units). \
 * Learn more about BoolUnit [here](https://docs.activejs.dev/fundamentals/units/boolunit).
 *
 * Just like every other ActiveJS Unit:
 * - BoolUnit extends {@link UnitBase}
 * - Which further extends {@link Base} and `Observable`
 *
 * @category 1. Units
 */
export declare class BoolUnit extends UnitBase<boolean> {
    /**
     * Current value of the Unit.
     * @default `false` (boolean false)
     *
     * @category Access Value
     */
    value(): boolean;
    /**
     * @internal please do not use.
     */
    protected defaultValue(): boolean;
    constructor(config?: UnitConfig<boolean>);
    /**
     * Extends {@link UnitBase.wouldDispatch} and adds additional check for type boolean,
     * which cannot be bypassed even by using param `force`.
     *
     * @param value The value to be dispatched.
     * @param force Whether dispatch-checks should be bypassed or not.
     * @returns A boolean indicating whether the param `value` would pass the dispatch-checks if dispatched.
     *
     * @category Common Units
     */
    wouldDispatch(value: boolean, force?: boolean): boolean;
    /**
     * @internal please do not use.
     */
    protected isValidValue(value: any): boolean;
}