IM服务最近版本在PushMessage对象中添加了republish方法，当消息被撤回/删除/更新时，这个值为true

src/main/java/cn/wildfirechat/push/PushMessage.java

@@ -31,6 +31,8 @@ public class PushMessage {
     public boolean isHiddenDetail;
     public String language;
     public long messageId;
+    //当消息被撤回/删除/更新时，这个值为true。
+    public boolean republish;
 
     public String getSender() {
         return sender;
@@ -183,4 +185,12 @@ public class PushMessage {
     public void setLanguage(String language) {
         this.language = language;
     }
+
+    public boolean isRepublish() {
+        return republish;
+    }
+
+    public void setRepublish(boolean republish) {
+        this.republish = republish;
+    }
 }