Tribe__Tickets_Plus__Meta__Export::__construct()
Listen out for the generation of a filtered (exportable) attendee list: we don’t need to do anything unless that fires.
Source
File: src/Tribe/Meta/Export.php
public function __construct() {
add_action( 'tribe_events_tickets_generate_filtered_attendees_list', array( $this, 'setup_columns' ) );
}