class_docstr: A container accepting FileDescriptorProtos and maps DescriptorProtos.
code: def FindFileContainingExtension(
      self, extendee_name, extension_number
  ):
      # TODO(jieluo): implement this API.
      return None
  
file_path: catboost/contrib/python/protobuf/py2/google/protobuf/descriptor_database.py
imports: import warnings
label_desc: Use image node_id 5 for calling the DescriptorDatabase obj's underlying member method code with example usage: obj.FindFileContainingExtension(extendee_name, extension_number) and returns: None