src/vs/workbench/services/workingCopy/common/workingCopyBackupService.ts/NativeWorkingCopyBackupServiceImpl/createPreamble
class NativeWorkingCopyBackupServiceImpl:	private createPreamble(identifier: IWorkingCopyIdentifier, meta?: IWorkingCopyBackupMeta): string {
		return `${identifier.resource.toString()}${NativeWorkingCopyBackupServiceImpl.PREAMBLE_META_SEPARATOR}${JSON.stringify({ ...meta, typeId: identifier.typeId })}${NativeWorkingCopyBackupServiceImpl.PREAMBLE_END_MARKER}`;
	}