code: public AvailabilitySetInner createOrUpdate(String resourceGroupName, String availabilitySetName, AvailabilitySetInner parameters) {
          return createOrUpdateWithServiceResponseAsync(resourceGroupName, availabilitySetName, parameters).toBlocking().single().body();
      }
docs: Create or update an availability set.
  
  @param resourceGroupName The name of the resource group.
  @param availabilitySetName The name of the availability set.
  @param parameters Parameters supplied to the Create Availability Set operation.
  @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 AvailabilitySetInner object if successful.