See: <a href="/doc/reference/classes/ucalc.callback/argbool/">ArgBool</a>, <a href="/doc/reference/classes/ucalc.callback/argint16/">ArgInt16</a>, <a href="/doc/reference/classes/ucalc.callback/argint32/">ArgInt32</a>, <a href="/doc/reference/classes/ucalc.callback/argint64/">ArgInt64</a>, <a href="/doc/reference/classes/ucalc.callback/returnbool/">ReturnBool</a>, <a href="/doc/reference/classes/ucalc.callback/returnint16/">ReturnInt16</a>, <a href="/doc/reference/classes/ucalc.callback/returnint32/">ReturnInt32</a>, <a href="/doc/reference/classes/ucalc.callback/returnint64/">ReturnInt64</a>