type ExpressionFunction = (...args: any[]) => any;
/**
 * Register a function to be used in expressions with the @ prefix
 * @param name - The name of the function to register
 * @param fn - The function implementation
 */
export declare function register(name: string, fn: ExpressionFunction): void;
/**
 * Get all the registered functions
 * @returns
 */
export declare function getFunctions(): Record<string, ExpressionFunction>;
export {};