path: "tensorflow.estimator.ModeKeys"
tf_class {
  is_instance: "<class \'tensorflow.python.estimator.model_fn.ModeKeys\'>"
  is_instance: "<type \'object\'>"
  member {
    name: "EVAL"
    mtype: "<type \'str\'>"
  }
  member {
    name: "PREDICT"
    mtype: "<type \'str\'>"
  }
  member {
    name: "TRAIN"
    mtype: "<type \'str\'>"
  }
  member_method {
    name: "__init__"
  }
}