code: def show_tree(self):
          
          self.initialize_view() # Clear before re-populating
          self.setItemsExpandable(True)
          self.setSortingEnabled(False)
          rootkey = self.find_root()  # This root contains profiler overhead
          if rootkey:
              self.populate_tree(self, self.find_callees(rootkey))
              self.resizeColumnToContents(0)
              self.setSortingEnabled(True)
              self.sortItems(1, Qt.AscendingOrder) # FIXME: hardcoded index
              self.change_view(1)
docs: Populate the tree with profiler data and display it.