New in version 2.0.
True when expr is a component with spanner attached:
abjad> staff = Staff("c'8 d'8 e'8 f'8")
abjad> beam = spannertools.BeamSpanner(staff.leaves)
abjad> f(staff)
\new Staff {
c'8 [
d'8
e'8
f'8 ]
}
abjad> spannertools.is_component_with_spanner_attached(staff[0])
True
Otherwise false:
abjad> spannertools.is_component_with_spanner_attached(staff)
False
When klass is not none then true when expr is a component with a spanner of klass attached.
Return true or false.