class_docstr: DataQueue test
code: def _internal_empty(self, DataQueueClass):
      que = DataQueueClass(
          [("url", ColumnType.SCALAR), ("image", ColumnType.SCALAR)]
      )
      que.put_dict({})
      self.assertEqual(que.size, 0)
      que.seal()
      self.assertEqual(que.size, 0)
  
      que = DataQueueClass(
          [("url", ColumnType.SCALAR), ("image", ColumnType.QUEUE)]
      )
      que.put_dict({})
      self.assertEqual(que.size, 0)
      que.seal()
      self.assertEqual(que.size, 0)
  
      que = DataQueueClass(
          [("url", ColumnType.QUEUE), ("image", ColumnType.QUEUE)]
      )
      que.put_dict({})
      self.assertEqual(que.size, 0)
      que.seal()
      self.assertEqual(que.size, 0)
  
imports: import unittest
  import threading
  import time
  from functools import partial
  from towhee.runtime.data_queue import DataQueue, ColumnType, Empty
label_desc: Use image node_id 13 for calling the TestDataQueue obj's underlying member method code with example usage: obj._internal_empty(DataQueueClass) without return types