private function _getPointers()
{
$_oScreen = get_current_screen();
$_sScreenID = $_oScreen->id;
if (in_array($_sScreenID, $this->aScreenIDs)) {
return apply_filters(get_class($this) . '-' . $_sScreenID, array());
}
if (isset($_GET['page'])) {
return apply_filters(get_class($this) . '-' . $_GET['page'], array());
}
return array();
}