code: public Observable<IntegrationAccountAgreementInner> getAsync(String resourceGroupName, String integrationAccountName, String agreementName) {
          return getWithServiceResponseAsync(resourceGroupName, integrationAccountName, agreementName).map(new Func1<ServiceResponse<IntegrationAccountAgreementInner>, IntegrationAccountAgreementInner>() {
              @Override
              public IntegrationAccountAgreementInner call(ServiceResponse<IntegrationAccountAgreementInner> response) {
                  return response.body();
              }
          });
      }
docs: Gets an integration account agreement.
  
  @param resourceGroupName The resource group name.
  @param integrationAccountName The integration account name.
  @param agreementName The integration account agreement name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the IntegrationAccountAgreementInner object