code: public AssemblyDefinitionInner createOrUpdate(String resourceGroupName, String integrationAccountName, String assemblyArtifactName, AssemblyDefinitionInner assemblyArtifact) {
          return createOrUpdateWithServiceResponseAsync(resourceGroupName, integrationAccountName, assemblyArtifactName, assemblyArtifact).toBlocking().single().body();
      }
docs: Create or update an assembly for an integration account.
  
  @param resourceGroupName The resource group name.
  @param integrationAccountName The integration account name.
  @param assemblyArtifactName The assembly artifact name.
  @param assemblyArtifact The assembly artifact.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the AssemblyDefinitionInner object if successful.