code: public RouteTableInner getByResourceGroup(String resourceGroupName, String routeTableName, String expand) {
          return getByResourceGroupWithServiceResponseAsync(resourceGroupName, routeTableName, expand).toBlocking().single().body();
      }
docs: Gets the specified route table.
  
  @param resourceGroupName The name of the resource group.
  @param routeTableName The name of the route table.
  @param expand Expands referenced resources.
  @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 RouteTableInner object if successful.