code: public static synchronized KeyStore getCertificateTrustStore()
        throws IOException, GeneralSecurityException {
      if (certTrustStore == null) {
        certTrustStore = SecurityUtils.getJavaKeyStore();
        InputStream keyStoreStream = GoogleUtils.class.getResourceAsStream("google.jks");
        SecurityUtils.loadKeyStore(certTrustStore, keyStoreStream, "notasecret");
      }
      return certTrustStore;
    }
docs: Returns the key store for trusted root certificates to use for Google APIs.
  
  <p>
  Value is cached, so subsequent access is fast.
  </p>
  
  @since 1.14