Set<String> (@NotNull Project project, @NotNull DataContext dataContext) { ProjectLevelVcsManager vcsManager = ProjectLevelVcsManager.getInstance(project); return VcsContextUtil.selectedFilePathsIterable(dataContext) .filterMap(vcsManager::getVcsFor) .map(AbstractVcs::getName) .unique() .take(vcsManager.getAllActiveVcss().length) // stop processing files if all available vcses are already affected .toSet(); }