code: def __contains__(self, el):
      return self.el == el
  
file_path: cpython/Lib/test/test_contains.py
imports: from collections import deque
  import unittest
  from test.support import NEVER_EQ
label_desc: Use image node_id 1 for calling the myset obj's underlying member method code with example usage: obj.__contains__(el) and returns: unknown