code: def on_about_to_process(self, plugin, instance):
          
  
          if instance is None:
              instance_item = self.data["models"]["item"].instances[0]
          else:
              instance_item = self.data["models"]["item"].instances[instance.id]
  
          plugin_item = self.data["models"]["item"].plugins[plugin.id]
  
          for section in self.data["models"]["item"].sections:
              if section.name == plugin_item.verb:
                  section.isProcessing = True
              if section.name == instance_item.category:
                  section.isProcessing = True
  
          instance_item.isProcessing = True
          plugin_item.isProcessing = True
docs: Reflect currently running pair in GUI