StructFactory.create(*type_parameters) expects:

        class name,
        ((binding requirement1,),
          (binding requirement2, bound_to_scope),
           ...),
        ((attribute_name1, attribute_sig1 (serialized)),
         (attribute_name2, attribute_sig2 ...),
         ...
         (attribute_nameN, ...))

def create(type_dict, *type_parameters):
    """
      StructFactory.create(*type_parameters) expects:

        class name,
        ((binding requirement1,),
          (binding requirement2, bound_to_scope),
           ...),
        ((attribute_name1, attribute_sig1 (serialized)),
         (attribute_name2, attribute_sig2 ...),
         ...
         (attribute_nameN, ...))
    """
    name, parameters = type_parameters
    for param in parameters:
      assert isinstance(param, tuple)
    typemap = dict((attr, TypeSignature.deserialize(param, type_dict))
                   for attr, param in parameters)
    attributes = {'TYPEMAP': typemap}
    return TypeMetaclass(str(name), (Structural,), attributes)