code: def _create_multi_exposure_action(self):
          
          self.action_multi_exposure = QAction(
              QIcon(resources_path('img', 'icons', 'show-multi-exposure.svg')),
              self.tr('InaSAFE Multi Exposure Tool'),
              self.iface.mainWindow())
          self.action_multi_exposure.setStatusTip(self.tr(
              'Open the multi exposure tool.'))
          self.action_multi_exposure.setWhatsThis(self.tr(
              'Open the multi exposure tool.'))
          self.action_multi_exposure.setEnabled(True)
          self.action_multi_exposure.triggered.connect(self.show_multi_exposure)
          self.add_action(
              self.action_multi_exposure, add_to_toolbar=self.full_toolbar)
docs: Create action for showing the multi exposure tool.