code: def uncollapse( self ):
          
          if ( not self.isCollapsed() ):
              return False
          
          self.parent().setSizes(self._storedSizes)
          self.unmarkCollapsed()
          
          return True
docs: Uncollapses the splitter this handle is associated with by restoring \
          its sizes from before the collapse occurred.
          
          :return     <bool> | changed