code: public ServiceFuture<CertificateBundle> mergeCertificateAsync(String vaultBaseUrl, String certificateName, List<byte[]> x509Certificates, CertificateAttributes certificateAttributes, Map<String, String> tags, final ServiceCallback<CertificateBundle> serviceCallback) {
          return ServiceFuture.fromResponse(mergeCertificateWithServiceResponseAsync(vaultBaseUrl, certificateName, x509Certificates, certificateAttributes, tags), serviceCallback);
      }
docs: Merges a certificate or a certificate chain with a key pair existing on the server.
  The MergeCertificate operation performs the merging of a certificate or certificate chain with a key pair currently available in the service. This operation requires the certificates/create permission.
  
  @param vaultBaseUrl The vault name, for example https://myvault.vault.azure.net.
  @param certificateName The name of the certificate.
  @param x509Certificates The certificate or the certificate chain to merge.
  @param certificateAttributes The attributes of the certificate (optional).
  @param tags Application specific metadata in the form of key-value pairs.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object