private static String toVmString(VirtualFile jdkOpts) {
    try {
      return new String(jdkOpts.contentsToByteArray(true), jdkOpts.getCharset());
    }
    catch (IOException e) {
      MavenLog.LOG.warn(e);
      return null;
    }
  }
private static String toVmString(VirtualFile jdkOpts)