src/vs/workbench/api/browser/mainThreadSCM.ts/MainThreadSCM/$updateGroupLabel
class MainThreadSCM:	$updateGroupLabel(sourceControlHandle: number, groupHandle: number, label: string): void {
		const repository = this._repositories.get(sourceControlHandle);

		if (!repository) {
			return;
		}

		const provider = repository.provider as MainThreadSCMProvider;
		provider.$updateGroupLabel(groupHandle, label);
	}