text: // define a macro
  syntax DEBUG_FUNC = function() {
    return #`console.log('A function was called.');`;
  };
  
  // sample functions
  function func_a() {
    DEBUG_FUNC;
    console.log( 'I am result of the function "a".' );
  }
  
  function func_b() {
    DEBUG_FUNC;
    console.log( 'I am result of the function "b".' );
  }
  
  // call sample functions
  func_a();
  func_b();