钉钉审批对接

钉钉审批对接中有一个DingTalkClient类，这个jar包在什么地方可以下载？

DingTalkClient client = new DefaultDingTalkClient("rest");
SmartworkBpmsProcessinstanceCreateRequest req = new SmartworkBpmsProcessinstanceCreateRequest();
req.setAgentId(41605932L);
req.setProcessCode("PROC-EF6YJL35P2-SCKICSB7P750S0YISYKV3-17IBLGZI-1");
req.setOriginatorUserId("manager432");
req.setDeptId(100L);
req.setApprovers("zhangsan,lisi");
req.setCcList("zhangsan,lisi");
req.setCcPosition("START");
List<FormComponentValueVo> list2 = new ArrayList<FormComponentValueVo>();
FormComponentValueVo obj3 = new FormComponentValueVo();
list2.add(obj3);
obj3.setName("请假类型");
obj3.setValue("事假");
obj3.setExtValue("总天数:1");
req.setFormComponentValues(list2);
SmartworkBpmsProcessinstanceCreateResponse rsp = client.execute(req, access_token);
System.out.println(rsp.getBody());