class_docstr: A Munch that returns a user-specified value for missing keys.
code: def fromDict(cls, d, default=None):
      # pylint: disable=arguments-differ
      return munchify(d, factory=lambda d_: cls(default, d_))
  
imports: from collections.abc import Mapping
label_desc: Use image node_id 7 for calling the DefaultMunch obj's underlying member method code with example usage: obj.fromDict(cls, d, default) and returns: munchify