src/vs/workbench/contrib/scm/browser/scmViewPane.ts/RepositoryVisibilityActionController/updateRepositoriesCounts
class RepositoryVisibilityActionController:	private updateRepositoriesCounts(): void {
		this.repositoryCountContextKey.set(this.items.size);
		this.repositoryVisibilityCountContextKey.set(Iterable.reduce(this.items.keys(), (r, repository) => r + (this.scmViewService.isVisible(repository) ? 1 : 0), 0));
	}