class_docstr: Registry is like a normal dict, but with an optional parent dict.
  
  Items are considered to exist in the registry if they are added to either the registry itself, or its parent.
class_docstr_tok: ["Registry","is","like","a","normal","dict",",","but","with","an","optional","parent","dict",".","Items","are","considered","to","exist","in","the","registry","if","they","are","added","to","either","the","registry","itself",",","or","its","parent","."]
code: def keys(self):
      return self._merged().keys()
  
file_path: ludwig/ludwig/utils/registry.py
imports: from collections import UserDict
  from typing import Generic, TypeVar
label_desc: Use image node_id 6 for calling the Registry obj's underlying member method code with example usage: obj.keys() and returns: self