code: def implement(cls, implementations, for_type=None, for_types=None):
          
          for type_ in cls.__get_type_args(for_type, for_types):
              cls._implement_for_type(for_type=type_,
                                      implementations=implementations)
docs: Provide protocol implementation for a type.
  
          Register all implementations of multimethod functions in this
          protocol and add the type into the abstract base class of the
          protocol.
  
          Arguments:
              implementations: A dict of (function, implementation), where each
                  function is multimethod and each implementation is a callable.
              for_type: The concrete type implementations apply to.
              for_types: Same as for_type, but takes a tuple of types.
  
              You may not supply both for_type and for_types for obvious reasons.
  
          Raises:
              ValueError for arguments.
              TypeError if not all implementations are provided or if there
                  are issues related to polymorphism (e.g. attempting to
                  implement a non-multimethod function.