@Override
  public String toString() {
    if (excludedRootUrls.length == 0 && excludedFromSdkRoots.isEmpty()) {
      return "ExcludePolicyDescriptor{" +
             "policyClass=" + policyClass.getSimpleName() +
             "; empty}";
    }
    return "ExcludePolicyDescriptor{" +
           "policyClass=" + policyClass.getSimpleName() +
           ", excludedRootUrls=" + Arrays.toString(excludedRootUrls) +
           ", excludedFromSdkRoots=" + excludedFromSdkRoots +
           '}';
  }
@Override
  public String toString()