src/vs/workbench/api/common/extHostSCM.ts/ExtHostSourceControl/createResourceGroup
class ExtHostSourceControl:	createResourceGroup(id: string, label: string): ExtHostSourceControlResourceGroup {
		const group = new ExtHostSourceControlResourceGroup(this.#proxy, this._commands, this.handle, id, label);
		const disposable = Event.once(group.onDidDispose)(() => this.createdResourceGroups.delete(group));
		this.createdResourceGroups.set(group, disposable);
		this.eventuallyAddResourceGroups();
		return group;
	}