@NotNull public static Collection<PsiFileSystemItem> getAbsoluteTopLevelDirLocations( final @NotNull PsiFile file) { final VirtualFile virtualFile = file.getVirtualFile(); if (virtualFile == null) { return Collections.emptyList(); } final Project project = file.getProject(); PsiDirectory parent = file.getParent(); final Module module = ModuleUtil.findModuleForPsiElement(parent == null ? file : parent); if (module == null) { return Collections.emptyList(); } final FileReferenceHelper[] helpers = FileReferenceHelperRegistrar.getHelpers(); final ArrayList<PsiFileSystemItem> list = new ArrayList<PsiFileSystemItem>(); for (FileReferenceHelper helper : helpers) { if (helper.isMine(project, virtualFile)) { final Collection<PsiFileSystemItem> roots = helper.getRoots(module); for (PsiFileSystemItem root : roots) { LOG.assertTrue(root != null, "Helper " + helper + " produced a null root for " + file); } list.addAll(roots); } } if (list.size() == 0) { list.addAll(FileReferenceHelperRegistrar.getNotNullHelper(file).getRoots(module)); } return list; }