subpanel controller not working

<?php
// created: 2016-05-02 14:56:36
$viewdefs['Emails']['base']['view']['subpanel-for-cases-archived_emails'] = array (
  'panels' =>
  array (
    0 =>
    array (
      'name' => 'panel_header',
      'label' => 'LBL_PANEL_1',
      'fields' =>
      array (
        0 =>
        array (
          'label' => 'LBL_LIST_SUBJECT',
          'enabled' => true,
          'default' => true,
          'name' => 'name',
          'link' => 'true',
          'width' => 'large',
        ),
        1 =>
        array (
          'name' => 'description',
          'label' => 'description',
          'enabled' => true,
          'width' => 'large',
          'default' => true,
        ),
        2 =>
        array (
          'label' => 'LBL_LIST_STATUS',
          'enabled' => true,
          'default' => true,
          'name' => 'status',
          'width' => 'xsmall',
        ),
        3 =>
        array (
          'label' => 'LBL_DATE_CREATED',
          'enabled' => true,
          'default' => true,
          'name' => 'date_entered',
          'readonly' => true,
          'width' => 'small',
        ),
        4 =>
        array (
          'label' => 'LBL_DATE_MODIFIED',
          'enabled' => true,
          'default' => true,
          'name' => 'date_modified',
          'readonly' => true,
          'width' => 'small',
        ),
        5 =>
        array (
          'name' => 'assigned_user_name',
          'target_record_key' => 'assigned_user_id',
          'target_module' => 'Employees',
          'label' => 'LBL_LIST_ASSIGNED_TO_NAME',
          'enabled' => true,
          'default' => true,
          'width' => 'small',
        ),
      ),
    ),
  ),
  'rowactions' =>
  array (
    'actions' =>
    array (
      array(
        'type' => 'rowaction',
        'css_class' => 'btn',
        'event' => 'list:do_some_task:fire',
        'label' => 'LBL_OPEN_EMAIL_DETAILS',
        'icon' => 'fa-frown-o',
        'tooltip' => 'do_some_task',
        'acl_action' => 'create',
      ),
    ),
  ),
  'type' => 'subpanel-list',
);

({
 extendsFrom:'SubpanelListView',
 initialize: function(options){
   this._super('initialize', [options]);
   this.context.on('list:xxxxx:fire',this.xxxXX, this);
   this.context.on('list:do_some_task:fire', this.do_some_task, this);
   console.log("-------");
},
do_some_task: function(event) {
console.log("do_some_task");
},
xxxXX: function(event) {
console.log("xxxXX");
},
});