pun_mutable:
duration might be changed during runtime
pun_round_to_next_24h_boundary
duration has to be aligned with next possible 24h boundary
pun_round_to_prev_24h_boundary
duration has to be aligned with previous 24h boundary
pun_align_with_timepoint
duration has to be aligned with dedicated time point
Removed:
pun_requires_change
Replaced by pu_mutable