BuddyPress.org

I’ve seen similar topics many times, but I haven’t found a helpful solution. I found the following code for bp-custom.php, it helped someone, but not me.

 function random3289_dont_save_join_group_activity( $activity_object ) {
$exclude = array( ‘joined_group’ );
if( in_array( $activity_object->type, $exclude ) )
$activity_object->type = false;
}
add_action(‘bp_activity_before_save’, ‘random3289_dont_save_join_group_activity’, 1, 1 );

Is there a way to filter who joined the group activity so that it was not visible in the users activity stream?
Thank you!