src/vs/workbench/services/workingCopy/common/workingCopyBackupService.ts/NativeWorkingCopyBackupServiceImpl/discardBackup
class NativeWorkingCopyBackupServiceImpl:	discardBackup(identifier: IWorkingCopyIdentifier): Promise<void> {
		const backupResource = this.toBackupResource(identifier);

		return this.doDiscardBackup(backupResource);
	}