Action-sytem-question.php

<?php
//Are all these args passed in from Ninja Forms?
//Is the data array build by Ninja Forms? 
// I am having trouble figuring out how to correctly use this process function in my actions.php
public function process( $action_settings, $form_id, $data )
    {
        $list = $action_settings[ 'newsletter_list' ];
        $double_opt_in = $action_settings[ 'double_opt_in' ];

        $data[ 'actions' ][ 'emma' ][ 'list' ] = $list;
        $data[ 'actions' ][ 'emma' ][ 'settings' ] = $action_settings;
        $data[ 'actions' ][ 'emma' ][ 'merge_vars' ] = $merge_vars;

        return $data;
    }