Collection<PsiDirectory> (GlobalSearchScope scope) { if (scope.isForceSearchingInLibrarySources()) { if (myDirectoriesWithLibSources == null) { myDirectoriesWithLibSources = createCachedDirectories(true); } return ContainerUtil.filter(myDirectoriesWithLibSources.getValue(), d -> scope.contains(d.getVirtualFile())); } else { if (myDirectories == null) { myDirectories = createCachedDirectories(false); } return ContainerUtil.filter(myDirectories.getValue(), d -> scope.contains(d.getVirtualFile())); } }