Returns a LilypondContexts.
LilypondContexts
| includes |
Example
LilypondContexts.list.printAll.postln;[ 'ChoirStaff', 'ChordNames', 'CueVoice', 'Devnull', 'DrumStaff', 'DrumVoice', 'Dynamics', 'FiguredBass', 'FretBoards', 'Global', 'GrandStaff', 'GregorianTranscriptionStaff', 'GregorianTranscriptionVoice', 'KievanStaff', 'KievanVoice', 'Lyrics', 'MensuralStaff', 'MensuralVoice', 'NoteNames', 'NullVoice', 'PetrucciStaff', 'PetrucciVoice', 'PianoStaff', 'RhythmicStaff', 'Score', 'Staff', 'StaffGroup', 'TabStaff', 'TabVoice', 'VaticanaStaff', 'VaticanaVoice', 'Voice' ]
LilypondContexts.includes('ChoirStaff').postln;true
LilypondContexts.includes('foo').postln;false