docs: def clear( self ):
          """
          Clears out all of the rollout items from the widget.
          """
          self.blockSignals(True)
          self.setUpdatesEnabled(False)
          for child in self.findChildren(XRolloutItem):
              child.setParent(None)
              child.deleteLater()
          self.setUpdatesEnabled(True)
          self.blockSignals(False)