def METHOD_NAME():
    def get_split_words(value: str):  # noqa
        return value.split(";")
    class MySchema(Schema):
        friends = fields.Function(deserialize=get_split_words)
    data = {"friends": "Clark;Alfred;Robin"}
    result = MySchema().load(data)
    assert result == {"friends": ["Clark", "Alfred", "Robin"]}