@Override
  public PsiJavaModule findModule(@NotNull String moduleName, @NotNull GlobalSearchScope scope) {
    Collection<PsiJavaModule> modules = findModules(moduleName, scope);
    return modules.size() == 1 ? modules.iterator().next() : null;
  }
@Override
  public PsiJavaModule findModule(@NotNull String moduleName, @NotNull GlobalSearchScope scope)