code: public void checkClientTrusted(X509Certificate[] chain, String authType)
                   throws CertificateException {
           try {
               pkixTrustManager.checkClientTrusted(chain, authType);
           } catch (CertificateException excep) {
               // do any special handling here, or rethrow exception.
           }
       }
docs: /*
  Delegate to the default trust manager.