(richJTDateTime: any2stringadd[RichJTDateTime]).+(other)
(richJTDateTime: Ordered[RichJTDateTime]).<(that)
(richJTDateTime: Ordered[RichJTDateTime]).<=(that)
(richJTDateTime: Ordered[RichJTDateTime]).>(that)
(richJTDateTime: Ordered[RichJTDateTime]).>=(that)
(richJTDateTime: Ordered[RichJTDateTime]).compare(that)
(richJTDateTime: Ordered[RichJTDateTime]).compareTo(that)