class_docstr: Module register
class_docstr_tok: ["Module","register"]
code: def __contains__(self, key):
      return key in self._dict
  
file_path: delta/delta/utils/register.py
imports: import importlib
  import os
  import sys
  from absl import logging
label_desc: Use image node_id 5 for calling the Register obj's underlying member method code with example usage: obj.__contains__(key) and returns: unknown