buildString method
Implementation
String buildString() {
_setNoteRanges();
return (global?.buildString() ?? '') +
controls.map((c) => c.buildString()).join('') +
effects.map((e) => e.buildString()).join('') +
curves.map((c) => c.buildString()).join('') +
groups.map((g) => g.buildString()).join('');
}