def add_multi_constructor(cls, tag_prefix, multi_constructor):
        if not 'yaml_multi_constructors' in cls.__dict__:
            cls.yaml_multi_constructors = cls.yaml_multi_constructors.copy()
        cls.yaml_multi_constructors[tag_prefix] = multi_constructor
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/yaml-3.10/yaml/constructor.py/BaseConstructor.add_multi_constructor/original