code: public Observable<List<RecoverableDatabaseInner>> listByServerAsync(String resourceGroupName, String serverName) {
          return listByServerWithServiceResponseAsync(resourceGroupName, serverName).map(new Func1<ServiceResponse<List<RecoverableDatabaseInner>>, List<RecoverableDatabaseInner>>() {
              @Override
              public List<RecoverableDatabaseInner> call(ServiceResponse<List<RecoverableDatabaseInner>> response) {
                  return response.body();
              }
          });
      }
docs: Gets a list of recoverable databases.
  
  @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 serverName The name of the server.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the List&lt;RecoverableDatabaseInner&gt; object