code: public void onRollback(@Nonnull NodeProvisioner.PlannedNode plannedNode, @Nonnull Node node,
                             @Nonnull Throwable t) {
          // Noop by default
      }
docs: Called when {@link Jenkins#addNode(Node)} throws an exception.
  
  @param plannedNode the plannedNode which resulted in the <code>node</code> being provisioned
  @param node the node which has been provisioned by the cloud
  @param t the exception
  
  @since 2.37