code: def addEntry(self):
          
          export_icon = QtGui.QIcon()
          pixmap = QtGui.QPixmap(os.path.join(PLUGINSDIR,
                                              'csv/icons/document-export.png'))
          export_icon.addPixmap(pixmap, QtGui.QIcon.Normal, QtGui.QIcon.On)
  
          self.plot_action = QtGui.QAction(
              translate('PlotpyBARdata',
                        "Plot data with pyBAR plugin",
                        "Plot data with pyBAR plugin"),
              self,
              shortcut=QtGui.QKeySequence.UnknownKey, triggered=self.plot,
              icon=export_icon,
              statusTip=translate('PlotpyBARdata',
                                  "Plotting of selected data with pyBAR",
                                  "Status bar text for the Dataset -> Plot pyBAR data... action"))
  
          # Add the action to the Dataset menu
          menu = self.vtgui.dataset_menu
          menu.addSeparator()
          menu.addAction(self.plot_action)
  
          # Add the action to the leaf context menu
          cmenu = self.vtgui.leaf_node_cm
          cmenu.addSeparator()
          cmenu.addAction(self.plot_action)
docs: Add the `Plot pyBAR data`. entry to `Dataset` menu.