/**
* Return the name of the requested page
*
* @param array $requestData The request's data
*
* @return null|string The name of the requested page or null in case no page has been requested
*/
protected function getRequestedPage(array $requestData)
{
if ($this->parent) {
return $this->parent->getRequestedPage($requestData);
}
if (isset($requestData[static::BTN_NEXT])) {
return $requestData[static::BTN_NEXT];
} elseif (isset($requestData[static::BTN_PREV])) {
return $requestData[static::BTN_PREV];
}
}