code: def clear(self):
      docks = self.findAll()[1]
      for dock in docks.values():
          dock.close()
  
imports: import weakref
  from ..Qt import QtWidgets
  from .Container import Container, HContainer, TContainer, VContainer
  from .Dock import Dock
  from .DockDrop import DockDrop
label_desc: Use image node_id 20 for calling the DockArea obj's underlying member method code with example usage: obj.clear() without return types