src/vs/workbench/contrib/scm/browser/menus.ts/SCMRepositoryMenus/getOrCreateResourceGroupMenusItem
class SCMRepositoryMenus:	private getOrCreateResourceGroupMenusItem(group: ISCMResourceGroup): SCMMenusItem {
		let result = this.resourceGroupMenusItems.get(group);

		if (!result) {
			const contextKeyService = this.contextKeyService.createOverlay([
				['scmResourceGroup', group.id],
			]);

			result = new SCMMenusItem(contextKeyService, this.menuService);
			this.resourceGroupMenusItems.set(group, result);
		}

		return result;
	}