String (@NotNull String newName, @NotNull Project project) { if (FileTypeManager.getInstance().isFileIgnored(newName)) { return JavaBundle.message("rename.package.ignored.name.warning"); } if (newName.length() > 0) { if (!PsiDirectoryFactory.getInstance(project).isValidPackageName(newName)) { return JavaBundle.message("rename.package.invalid.name.error"); } } return null; }