import { TReferenceProps } from '../../..';
import { IBooleanProps, TBooleanValidatorResult } from '../_types';
export interface IIsTrueProps {
}
/**
 * Check if the `boolean` is `true`.
 */
export declare const isTrue: (props?: TReferenceProps<IIsTrueProps> & IBooleanProps) => TBooleanValidatorResult;