Files used to display dan sle stream

Hello,
I would like to know if possible the files used in the stream to notify the behavior of the members.

For example when a member becomes friend with another I modified this file: (media / com_easysocial / apps / user / friends / themes / default / streams / friends.title.php)

Is it possible to know the path of files that display when a member joins a group or likes a page.
Also the one that displays in the stream the messages posted in a group, in a page ...

Best regards.

Eric