def get_id(self, idPrefix: str, version: int) -> str:
    res = ['cl', idPrefix]
    for e in self.lst.exprs:
        res.append(e.get_id(version))
    res.append('E')
    return ''.join(res)
def get_id(self, idPrefix: str, version: int) -> str:
    res = ['cl', idPrefix]
    for e in self.lst.exprs:
        res.append(e.get_id(version))
    res.append('E')
    return .join(res)