docs: def _selectTree( self ):
          """
          Matches the tree selection to the views selection.
          """
          self.uiGanttTREE.blockSignals(True)
          self.uiGanttTREE.clearSelection()
          for item in self.uiGanttVIEW.scene().selectedItems():
              item.treeItem().setSelected(True)
          self.uiGanttTREE.blockSignals(False)