/**
* Display the wizard
*
* @author KnowledgeTree Team
* @access private
* @param string
* @return void
*/
public function displayUpgrader($response = null)
{
if ($response) {
$ins = new Upgrader();
// Instantiate the upgrader
$ins->resolveErrors($response);
// Run step
} else {
$ins = new Upgrader(new session());
// Instantiate the upgrader and pass the session class
$ins->step();
// Run step
}
}