@Anton Tananaev this one that I modified does not work correctly since I took it from the master but when I take the correct one from version 5.2 there is the inconvenience of the push notifications that you corrected in the post https://www.traccar.org/forums/topic/question-52/ so when I fix the group I lose the push notifications .
The problem is that from the JAR I don't know how to modify it, you could send the JAR that has the correction of the push notifications and the grouping of these if it is within your possibilities
@Anton Tananaev this one that I modified does not work correctly since I took it from the master but when I take the correct one from version 5.2 there is the inconvenience of the push notifications that you corrected in the post https://www.traccar.org/forums/topic/question-52/ so when I fix the group I lose the push notifications .
The problem is that from the JAR I don't know how to modify it, you could send the JAR that has the correction of the push notifications and the grouping of these if it is within your possibilities