if (taskInstanceQueryRollBack.getTaskGroup() != null) {
try {
UserTaskBehavior backNodeUserTask = (UserTaskBehavior)getProcessInstance().getProcessDefinition().getDefinitions().getElement(rollBackNodeId);
taskInstance.toFlowNodeEnd(taskCommand, taskComment, backNodeUserTask, null);
} catch (Exception e) {
throw new FixFlowException("任务: " + taskId + " 退回失败!", e);
}