def METHOD_NAME(self) -> SelectType:
    return Function(
        "toDateTime",
        [
            Function(
                "multiply",
                [
                    Function(
                        "intDiv",
                        [
                            Function("toUInt32", [Column("timestamp")]),
                            self.interval,
                        ],
                    ),
                    self.interval,
                ],
            ),
        ],
        "time",
    )