/**
* Prepares a query set to be handed over to the build() method.
* This should complete a partial query set to work as a complete non-SEFed
* URL and in general make sure that all information is present and properly
* formatted. For example, the Itemid should be retrieved and set here.
*
* @param array &$query The query array to process
*
* @return void
*
* @since 3.4
*/
public function preprocess(&$query);