code: def metrics(self):
      return [
          metric
          for metric in [
              self.cpu_usage_metric,
              self.memory_metric,
              self.gpu_usage_metric,
              self.gpu_memory_metric,
          ]
          if metric is not None
      ]
  
label_desc: Use image node_id 2 for calling the MetricsContainer obj's underlying member method code with example usage: obj.metrics() and returns: unknown