code: private void resolveProxyKeyUsage() {
  
      boolean[] keyUsages = proxyCredential.getCertificate().getKeyUsage();
  
      if (keyUsages != null) {
        int index = 0;
  
        for (boolean key : keyUsages) {
  
          if (key)
            proxyKeyUsageList.add(keyUsagesValues[index]);
          index++;
  
        }
      }
  
    }
docs: /*
  Extracts the list of KeyUsage from the proxy