code: def _create_multi_buffer_action(self):
          
          icon = resources_path('img', 'icons', 'show-multi-buffer.svg')
          self.action_multi_buffer = QAction(
              QIcon(icon),
              self.tr('Multi Buffer'), self.iface.mainWindow())
          self.action_multi_buffer.setStatusTip(self.tr(
              'Open InaSAFE multi buffer'))
          self.action_multi_buffer.setWhatsThis(self.tr(
              'Open InaSAFE multi buffer'))
          self.action_multi_buffer.triggered.connect(self.show_multi_buffer)
          self.add_action(
              self.action_multi_buffer,
              add_to_toolbar=self.full_toolbar)
docs: Create action for multi buffer dialog.