path: "tensorflow.GraphDef"
tf_proto {
  descriptor {
    name: "GraphDef"
    field {
      name: "node"
      number: 1
      label: LABEL_REPEATED
      type: TYPE_MESSAGE
      type_name: ".tensorflow.NodeDef"
    }
    field {
      name: "versions"
      number: 4
      label: LABEL_OPTIONAL
      type: TYPE_MESSAGE
      type_name: ".tensorflow.VersionDef"
    }
    field {
      name: "version"
      number: 3
      label: LABEL_OPTIONAL
      type: TYPE_INT32
      options {
        deprecated: true
      }
    }
    field {
      name: "library"
      number: 2
      label: LABEL_OPTIONAL
      type: TYPE_MESSAGE
      type_name: ".tensorflow.FunctionDefLibrary"
    }
  }
}