Register plugin in Spyder's main window

def register_plugin(self):
        """Register plugin in Spyder's main window"""
        self.breakpoints.edit_goto.connect(self.main.editor.load)
        #self.redirect_stdio.connect(self.main.redirect_internalshell_stdio)
        self.breakpoints.clear_all_breakpoints.connect(
                                        self.main.editor.clear_all_breakpoints)
        self.breakpoints.clear_breakpoint.connect(
            self.main.editor.clear_breakpoint)
        self.main.editor.breakpoints_saved.connect(self.breakpoints.set_data)
        self.breakpoints.set_or_edit_conditional_breakpoint.connect(
                           self.main.editor.set_or_edit_conditional_breakpoint)
        
        self.main.add_dockwidget(self)
        
        list_action = create_action(self, _("List breakpoints"),
                                   triggered=self.show)
        list_action.setEnabled(True)
        pos = self.main.debug_menu_actions.index('list_breakpoints')
        self.main.debug_menu_actions.insert(pos, list_action)
        self.main.editor.pythonfile_dependent_actions += [list_action]