src/vs/workbench/services/workingCopy/common/workingCopyFileOperationParticipant.ts/WorkingCopyFileOperationParticipant/addFileOperationParticipant
class WorkingCopyFileOperationParticipant:	addFileOperationParticipant(participant: IWorkingCopyFileOperationParticipant): IDisposable {
		const remove = this.participants.push(participant);
		return toDisposable(() => remove());
	}