code: def contains_field_list(self, path, name):
          
          try:
              self.get_field_list(path, name)
              return True
          except KeyError:
              return False
docs: Returns True if a multi-valued field exists at the specified path, otherwise False.
  
          :param path: str or Path instance
          :param name:
          :type name: str
          :return:
          :raises ValueError: A component of path is a field name.
          :raises TypeError: The field name is a component of a path.