# -*- encoding: utf-8 -*-


def get_stem_tremolo_format_contributions(component):
    '''Get stem tremolo format contributions for `component`.

    Returns list.
    '''
    from abjad.tools import marktools

    result = []

    if component._has_mark(marktools.StemTremolo):
        stem_tremolo = marktools.get_stem_tremolo_attached_to_component(component)
        result.append(stem_tremolo.lilypond_format)

    return ['stem tremolo', result]
