code: def test_callback_vessel_callbacks_setter():
      new_callback_vessel = callback.CallbackVessel([])
  
      try:
          new_callback_vessel.callbacks = 1
      except:
          new_callback_vessel.callbacks = []
  
      assert new_callback_vessel.callbacks == []
  
file_path: opytimizer/tests/opytimizer/utils/test_callback.py
imports: from opytimark.markers.n_dimensional import Sphere
  from opytimizer.core import function
  from opytimizer.optimizers import swarm
  from opytimizer.opytimizer import Opytimizer
  from opytimizer.spaces import search
  from opytimizer.utils import callback
label_desc: Use image node_id 4 for calling a global function with example usage: test_callback_vessel_callbacks_setter() without return types