docs: def lockToColumn(self, index):
          """
          Sets the column that the tree view will lock to.  If None is supplied,
          then locking will be removed.
          
          :param      index | <int> || None
          """
          self._lockColumn = index
          
          if index is None:
              self.__destroyLockedView()
              return
          else:
              if not self._lockedView:
                  view = QtGui.QTreeView(self.parent())
                  view.setModel(self.model())
                  view.setSelectionModel(self.selectionModel())
                  view.setItemDelegate(self.itemDelegate())
                  view.setFrameShape(view.NoFrame)
                  view.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
                  view.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
                  view.setRootIsDecorated(self.rootIsDecorated())
                  view.setUniformRowHeights(True)
                  view.setFocusProxy(self)
                  view.header().setFocusProxy(self.header())
                  view.setStyleSheet(self.styleSheet())
                  view.setAutoScroll(False)
                  view.setSortingEnabled(self.isSortingEnabled())
                  view.setPalette(self.palette())
                  view.move(self.x(), self.y())
                  
                  self.setAutoScroll(False)
                  self.setUniformRowHeights(True)
                  
                  view.collapsed.connect(self.collapse)
                  view.expanded.connect(self.expand)
                  view.expanded.connect(self.__updateLockedView)
                  view.collapsed.connect(self.__updateLockedView)
                  
                  view_head = view.header()
                  for i in range(self.columnCount()):
                      view_head.setResizeMode(i, self.header().resizeMode(i))
                  
                  view.header().sectionResized.connect(self.__updateStandardSection)
                  self.header().sectionResized.connect(self.__updateLockedSection)
                  
                  vbar = view.verticalScrollBar()
                  self.verticalScrollBar().valueChanged.connect(vbar.setValue)
                  
                  self._lockedView = view
              
              self.__updateLockedView()