code: public ServiceFuture<AvailableProvidersListInner> beginListAvailableProvidersAsync(String resourceGroupName, String networkWatcherName, AvailableProvidersListParameters parameters, final ServiceCallback<AvailableProvidersListInner> serviceCallback) {
          return ServiceFuture.fromResponse(beginListAvailableProvidersWithServiceResponseAsync(resourceGroupName, networkWatcherName, parameters), serviceCallback);
      }
docs: Lists all available internet service providers for a specified Azure region.
  
  @param resourceGroupName The name of the network watcher resource group.
  @param networkWatcherName The name of the network watcher resource.
  @param parameters Parameters that scope the list of available providers.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object