tensorflow/core/ops/compat/ops_history_v1/QueueSizeV2.pbtxt

op {
  name: "QueueSizeV2"
  input_arg {
    name: "handle"
    type: DT_RESOURCE
  }
  output_arg {
    name: "size"
    type: DT_INT32
  }
  is_stateful: true
}