code: def test_manager_set_queue_process(self, sentinel):
      s = sentinel(0)
      manager = PerspectiveManager()
      table = Table({"a": [1, 2, 3]})
      manager.host_table("tbl", table)
      table.update({"a": [4, 5, 6]})
      assert table.view().to_dict() == {"a": [1, 2, 3, 4, 5, 6]}
  
      def fake_queue_process(f, *args, **kwargs):
          s.set(s.get() + 1)
          f(*args, **kwargs)
  
      manager.set_loop_callback(fake_queue_process)
      table.update({"a": [7, 8, 9]})
      assert s.get() == 1
  
imports: import json
  import time
  import numpy
  import pyarrow
  from datetime import datetime
  from functools import partial
  from pytest import raises
  from perspective import Table, PerspectiveError, PerspectiveManager
label_desc: Use image node_id 50 for calling the TestPerspectiveManager obj's underlying member method code with example usage: obj.test_manager_set_queue_process(sentinel) without return types