how to make a "prefix change listener"

hi everyone thank you for coming,
questioning how can i make a listener for player prefix change event.

or listening Essentials-GroupManager / PermissionEX or either plugin can change player prefix

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

I think that this would be entirely dependent on the plugin that is handling the prefix.

 

I have removed some troll posts, and replies to those posts.

 

eh ok...
looks like ever "sarcasm mode" not working here...

you should listen PlayerCommandPreprocessEvent and ServerCommandEvent for commands that may change player's prefix.

as far as i know player prefix wont change on it's own, it always changed by user action and this is very very obvious.