code: def patterned(self):
          
          pattFill = self._xPr.get_or_change_to_pattFill()
          self._fill = _PattFill(pattFill)
docs: Selects the pattern fill type.
  
          Note that calling this method does not by itself set a foreground or
          background color of the pattern. Rather it enables subsequent
          assignments to properties like fore_color to set the pattern and
          colors.