Prado\Web\UI\WebControls\TWizardStepCollection::insertAt PHP Method

    public function insertAt($index, $item)
    {
        if ($item instanceof TWizardStep) {
            parent::insertAt($index, $item);
            $this->_wizard->getMultiView()->getViews()->insertAt($index, $item);
            $this->_wizard->addedWizardStep($item);
        } else {
            throw new TInvalidDataTypeException('wizardstepcollection_wizardstep_required');
        }
    }