old_contents: from .BaseControlClass import *
  from .Styling import DefaultStyle
  
  
  class Panel(BaseControl):
      """
          Flat container for Gui objects.
  
         @rtype : Panel
      """
  
      def __init__(self, left, top, width, height, parent, pinning=PinningEnum.TopLeft, color=None, ID=None,
                   imgID=None, rotation=None):
          style = DefaultStyle(color)
          if color is None:
              color = style.backgroundColor
          super(Panel, self).__init__(left, top, width, height, parent, pinning, color, ID, imgID, rotation,
                                      style)
          self._passEventDown = True
  
new_contents: from .BaseControlClass import *
  from .Styling import DefaultStyle
  
  
  class Panel(BaseControl):
      """
          Flat container for Gui objects.
  
         @rtype : Panel
      """
  
      def __init__(self, left, top, width, height, parent, pinning=PinningEnum.TopLeft, color=None, ID=None,
                   imgID=None, rotation=None, style=None):
          style = style or DefaultStyle(color)
          if color is None:
              color = style.backgroundColor
          super(Panel, self).__init__(left, top, width, height, parent, pinning, color, ID, imgID, rotation,
                                      style)
          self._passEventDown = True
  
subject: Add missing style parameter.