code: public Observable<VaultCertificateResponseInner> createAsync(String resourceGroupName, String vaultName, String certificateName) {
          return createWithServiceResponseAsync(resourceGroupName, vaultName, certificateName).map(new Func1<ServiceResponse<VaultCertificateResponseInner>, VaultCertificateResponseInner>() {
              @Override
              public VaultCertificateResponseInner call(ServiceResponse<VaultCertificateResponseInner> response) {
                  return response.body();
              }
          });
      }
docs: Uploads a certificate for a resource.
  
  @param resourceGroupName The name of the resource group where the recovery services vault is present.
  @param vaultName The name of the recovery services vault.
  @param certificateName Certificate friendly name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the VaultCertificateResponseInner object