src/vs/workbench/services/workingCopy/common/storedFileWorkingCopySaveParticipant.ts/StoredFileWorkingCopySaveParticipant/addSaveParticipant
class StoredFileWorkingCopySaveParticipant:	addSaveParticipant(participant: IStoredFileWorkingCopySaveParticipant): IDisposable {
		const remove = insert(this.saveParticipants, participant);

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