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