/**
 * OptionalBooleanQuery
 *
 * Factory function that creates a NestJS query decorator for boolean flags.
 * It automatically applies the `ParseOptionalBooleanPipe`, so controller methods
 * receive properly typed booleans instead of raw strings.
 *
 * This prevents controllers from having to manually parse query string values
 * and keeps intent clear at the method signature level.
 *
 * @param {string} propertyName - The name of the query parameter to bind.
 * @returns {ParameterDecorator} - A NestJS parameter decorator for controller methods.
 */
export declare function OptionalBooleanQuery(propertyName: string): ParameterDecorator;
/**
 * ApiOptionalBooleanQuery
 *
 * Swagger documentation helper for optional boolean query parameters.
 * By applying this decorator, the parameter will appear in API documentation
 * with clear details, marked as optional, and defaulting to `false`.
 *
 * This ensures consumers of the API understand that the flag exists,
 * what it controls, and that its omission is safe.
 *
 * @param {string} propertyName - The query parameter name to display in Swagger docs.
 * @param {string} [description] - Optional human-readable explanation for the parameter.
 * @returns {MethodDecorator & ClassDecorator} - A combined decorator for use on routes or controllers.
 */
export declare function ApiOptionalBooleanQuery(propertyName: string, description?: string): MethodDecorator & ClassDecorator;