code: def update_compatibility_decorators(binding, decorators):
      
  
      def _widgetDecorator(some_function):
          def wrapper(*args, **kwargs):
              ret = some_function(*args, **kwargs)
              # Modifies the returned value so we can test that the
              # decorator works.
              return "Test: {}".format(ret)
          # preserve docstring and name of original function
          wrapper.__doc__ = some_function.__doc__
          wrapper.__name__ = some_function.__name__
          return wrapper
  
      # Assign a different decorator for the same method name on each class
      def _mainWindowDecorator(some_function):
          def wrapper(*args, **kwargs):
              ret = some_function(*args, **kwargs)
              # Modifies the returned value so we can test that the
              # decorator works.
              return "QMainWindow Test: {}".format(ret)
          # preserve docstring and name of original function
          wrapper.__doc__ = some_function.__doc__
          wrapper.__name__ = some_function.__name__
          return wrapper
      decorators.setdefault("QWidget", {})["windowTitleDecorator"] = (
          _widgetDecorator
      )
      decorators.setdefault("QMainWindow", {})["windowTitleDecorator"] = (
          _mainWindowDecorator
      )
docs: This optional function is called by Qt.py to modify the decorators
      applied to QtCompat namespace objects.
  
      Arguments:
          binding (str): The Qt binding being wrapped by Qt.py
          decorators (dict): Maps specific decorator functions to
              QtCompat namespace methods. See Qt._build_compatibility_members
              for more info.