code: def check(self, instance):
          
  
          # Get the config for the istio_mesh instance
          istio_mesh_endpoint = instance.get('istio_mesh_endpoint')
          istio_mesh_config = self.config_map[istio_mesh_endpoint]
  
          # Process istio_mesh
          self.process(istio_mesh_config)
  
          # Get the config for the process_mixer instance
          process_mixer_endpoint = instance.get('mixer_endpoint')
          process_mixer_config = self.config_map[process_mixer_endpoint]
  
          # Process process_mixer
          self.process(process_mixer_config)
docs: Process both the istio_mesh instance and process_mixer instance associated with this instance