src/vs/workbench/services/textfile/common/textFileSaveParticipant.ts/TextFileSaveParticipant/addSaveParticipant
class TextFileSaveParticipant:	addSaveParticipant(participant: ITextFileSaveParticipant): IDisposable {
		const remove = insert(this.saveParticipants, participant);

		return toDisposable(() => remove());
	}