gistfile1.php

 <?php
 public function options() {
            return array(
                'id'=>array('type' => 'boolean', 'required' => true),
                'type'=>'button_set',
                'title'=>array('type' => 'string', 'required' => true),
                'subtitle'=>array('type' => 'string', 'required' => true),
                'desc'=> array('type' => 'string', 'required' => true),
                'required' => true,
                'customizer' => true,
                'validation' => false,
                'options' => array(
                        0 => array('type'=>'string', 'title'=>'key'),
                        1 => array('type'=>'string', 'title'=>'Text', 'desc'=>'Text that appears in the button'),
                    ),
                'default'=> array('type'=>'string')
            );
        }