New in version 2.0.
Delete contents of container contents starting strictly before prolated_offset:
abjad> staff = Staff("c'8 d'8 e'8 f'8")
abjad> spannertools.BeamSpanner(staff.leaves)
BeamSpanner(c'8, d'8, e'8, f'8)
abjad> f(staff)
\new Staff {
c'8 [
d'8
e'8
f'8 ]
}
abjad> containertools.delete_contents_of_container_starting_strictly_before_prolated_offset(staff, Duration(1, 8))
Staff{3}
abjad> f(staff)
\new Staff {
d'8 [
e'8
f'8 ]
}
Return container.
Changed in version 2.0: renamed containertools.contents_delete_starting_before_prolated_offset() to containertools.delete_contents_of_container_starting_strictly_before_prolated_offset().