code: def _create_show_definitions_action(self):
          
          icon = resources_path('img', 'icons', 'show-inasafe-help.svg')
          self.action_show_definitions = QAction(
              QIcon(icon),
              self.tr('InaSAFE Help'),
              self.iface.mainWindow())
          self.action_show_definitions.setStatusTip(self.tr(
              'Show InaSAFE Help'))
          self.action_show_definitions.setWhatsThis(self.tr(
              'Use this to show a document describing all InaSAFE concepts.'))
          self.action_show_definitions.triggered.connect(
              self.show_definitions)
          self.add_action(
              self.action_show_definitions,
              add_to_toolbar=True)
docs: Create action for showing definitions / help.