code: def __init__(self, name, cls, module_name=None):
      self.name = name
      self.cls = cls
      self.module_name = module_name
  
file_path: streamz/streamz/tests/test_plugins.py
imports: import inspect
  import pytest
  from streamz import Source, Stream
label_desc: Use image node_id 1 to create a new MockEntryPoint object  with example: obj = MockEntryPoint(name, cls, module_name)