import { NopePrimitive } from './NopePrimitive';
export declare class NopeBoolean extends NopePrimitive<boolean> {
    protected _type: string;
    true(message?: string): this;
    false(message?: string): this;
    validate(entry?: any, context?: Record<string | number, unknown>): string | undefined;
    validateAsync(entry?: any, context?: Record<string | number, unknown>): Promise<string | undefined>;
}