code: def merge(self, other):
          
          ignore = self.ignore
          extra = self.extras
          if isinstance(other, Dict):
              other_keys = other.keys
              ignore += other.ignore
              extra += other.extras
          elif isinstance(other, (list, tuple)):
              other_keys = list(other)
          elif isinstance(other, dict):
              return self.__class__(other, *self.keys)
          else:
              raise TypeError('You must merge Dict only with Dict'
                              ' or list of Keys')
          return self.__class__(*(self.keys + other_keys), ignore_extra=ignore,
                                allow_extra=extra)
docs: Extends one Dict with other Dict Key`s or Key`s list,
          or dict instance supposed for Dict