This method is called when the Quick Icons module is constructing its set of icons. You can return an array which defines a single icon and it will be rendered right after the stock Quick Icons.
A list of icon definition associative arrays, consisting of the keys link, image, text and access.
$return = array(
array(
'link' => 'index.php?option=com_joomlaupdate',
'image' => 'joomla',
'icon' => 'header/icon-48-download.png',
'text' => JText::_('PLG_QUICKICON_JOOMLAUPDATE_CHECKING'),
'id' => 'plg_quickicon_joomlaupdate',
'group' => 'MOD_QUICKICON_MAINTENANCE'
)
);