code: @Override
    public void checkClientTrusted(X509Certificate[] x509Certificates, String string)
        throws CertificateException {
      if (trustManager == null) {
        return;
      }
      trustManager.checkClientTrusted(x509Certificates, string);
    }
docs: Check client trusted.
  
  @param x509Certificates certificate
  @param string           string
  @throws CertificateException exception