code: public ServiceFuture<List<VirtualMachineSizeInner>> listAsync(String location, final ServiceCallback<List<VirtualMachineSizeInner>> serviceCallback) {
          return ServiceFuture.fromResponse(listWithServiceResponseAsync(location), serviceCallback);
      }
docs: Lists all available virtual machine sizes for a subscription in a location.
  
  @param location The location upon which virtual-machine-sizes is queried.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object