code: public SignalRResourceInner beginCreateOrUpdate(String resourceGroupName, String resourceName, SignalRCreateParameters parameters) {
          return beginCreateOrUpdateWithServiceResponseAsync(resourceGroupName, resourceName, parameters).toBlocking().single().body();
      }
docs: Create a new SignalR service and update an exiting SignalR service.
  
  @param resourceGroupName The name of the resource group that contains the resource. You can obtain this value from the Azure Resource Manager API or the portal.
  @param resourceName The name of the SignalR resource.
  @param parameters Parameters for the create or update 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 SignalRResourceInner object if successful.