path: "tensorflow.RunMetadata"
tf_proto {
  descriptor {
    name: "RunMetadata"
    field {
      name: "step_stats"
      number: 1
      label: LABEL_OPTIONAL
      type: TYPE_MESSAGE
      type_name: ".tensorflow.StepStats"
    }
    field {
      name: "cost_graph"
      number: 2
      label: LABEL_OPTIONAL
      type: TYPE_MESSAGE
      type_name: ".tensorflow.CostGraphDef"
    }
    field {
      name: "partition_graphs"
      number: 3
      label: LABEL_REPEATED
      type: TYPE_MESSAGE
      type_name: ".tensorflow.GraphDef"
    }
  }
}