tensorflow/core/ops/compat/ops_history_v1/LMDBReader.pbtxt

op {
  name: "LMDBReader"
  output_arg {
    name: "reader_handle"
    type: DT_STRING
    is_ref: true
  }
  attr {
    name: "container"
    type: "string"
    default_value {
      s: ""
    }
  }
  attr {
    name: "shared_name"
    type: "string"
    default_value {
      s: ""
    }
  }
  is_stateful: true
}