code: public Observable<Page<IntegrationAccountCertificateInner>> listByIntegrationAccountsAsync(final String resourceGroupName, final String integrationAccountName) {
          return listByIntegrationAccountsWithServiceResponseAsync(resourceGroupName, integrationAccountName)
              .map(new Func1<ServiceResponse<Page<IntegrationAccountCertificateInner>>, Page<IntegrationAccountCertificateInner>>() {
                  @Override
                  public Page<IntegrationAccountCertificateInner> call(ServiceResponse<Page<IntegrationAccountCertificateInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Gets a list of integration account certificates.
  
  @param resourceGroupName The resource group name.
  @param integrationAccountName The integration account name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;IntegrationAccountCertificateInner&gt; object