New in version 2.0.
Get exactly one noncontext_mark attached to component:
abjad> staff = Staff("c'8 d'8 e'8 f'8")
abjad> marktools.Articulation('staccato')(staff[0])
Articulation('staccato')(c'8)
abjad> f(staff)
\new Staff {
c'8 -\staccato
d'8
e'8
f'8
}
abjad> marktools.get_noncontext_mark_attached_to_component(staff[0])
Articulation('staccato')(c'8)
Return one noncontext_mark.
Raise missing mark error when no noncontext_mark is attached.
Raise extra mark error when more than one noncontext_mark is attached.