Message message1 = new Message();
message1.setSenderId(senderId);
message1.setReceiverId(receiverId);
message1.setTitle("abcded");
MessageContent content1 = new MessageContent();
content1.setContent("abcde");
message1.setContent(content1);
messageApi.send(message1);
Message message2 = new Message();
message2.setSenderId(senderId);
message2.setReceiverId(receiverId);
message2.setTitle("abcded");
MessageContent content2 = new MessageContent();
content2.setContent("abcde");
message2.setContent(content2);
message2.setParentId(message1.getId());
messageApi.send(message2);
Message message3 = new Message();
message3.setSenderId(senderId);
message3.setReceiverId(receiverId);
message3.setTitle("abcded");
MessageContent content3 = new MessageContent();
content3.setContent("abcde");
message3.setContent(content3);
message3.setParentId(message2.getId());
messageApi.send(message3);