code: public Observable<List<EventHubConnectionInner>> listByDatabaseAsync(String resourceGroupName, String clusterName, String databaseName) {
          return listByDatabaseWithServiceResponseAsync(resourceGroupName, clusterName, databaseName).map(new Func1<ServiceResponse<List<EventHubConnectionInner>>, List<EventHubConnectionInner>>() {
              @Override
              public List<EventHubConnectionInner> call(ServiceResponse<List<EventHubConnectionInner>> response) {
                  return response.body();
              }
          });
      }
docs: Returns the list of Event Hub connections of the given Kusto database.
  
  @param resourceGroupName The name of the resource group containing the Kusto cluster.
  @param clusterName The name of the Kusto cluster.
  @param databaseName The name of the database in the Kusto cluster.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the List&lt;EventHubConnectionInner&gt; object