New in version 1.1.
Group durations by implied prolation:
abjad> from abjad.tools import durationtools
abjad> durationtools.group_duration_tokens_by_implied_prolation([(1, 4), (1, 8), (1, 3), (1, 6), (1, 4)])
[[(1, 4), (1, 8)], [(1, 3), (1, 6)], [(1, 4)]]
Return list of integer pair lists.
Changed in version 2.0: renamed durationtools.agglomerate_by_prolation() to durationtools.group_duration_tokens_by_implied_prolation().