PsiDirectory (ResourceBundle resourceBundle) { PsiDirectory containingDirectory = null; for (PropertiesFile propertiesFile : resourceBundle.getPropertiesFiles()) { if (containingDirectory == null) { containingDirectory = propertiesFile.getContainingFile().getContainingDirectory(); } else if (!containingDirectory.isEquivalentTo(propertiesFile.getContainingFile().getContainingDirectory())) { return null; } } LOG.assertTrue(containingDirectory != null); return containingDirectory; }