docs: def _from_dict(cls, _dict):
          """Initialize a IdentifiableLanguages object from a json dictionary."""
          args = {}
          if 'languages' in _dict:
              args['languages'] = [
                  IdentifiableLanguage._from_dict(x)
                  for x in (_dict.get('languages'))
              ]
          else:
              raise ValueError(
                  'Required property \'languages\' not present in IdentifiableLanguages JSON'
              )
          return cls(**args)