import { MessageFunctionType, Result } from '../types';
export interface IsBooleanStringErrors {
    TARGET_ARGUMENT_NOT_A_STRING: MessageFunctionType;
}
export declare const IS_BOOLEAN_STRING_ERRORS: IsBooleanStringErrors;
/**
 * Checks whether the `target` is a boolean string value
 * meaning it contains of of `['true', 'false', '1', '0']`
 *
 * ### Example
 * ```
 * expect(isBooleanString('true').value).toBeTruthy()
 * ```
 * @param target The target
 */
export declare function isBooleanString(target: string): Result<boolean | undefined>;