public function searchByProximity($center, $tolerance, $maxItems = 0)
{
$this->retriever->setSaveMemory(true);
$categories = $this->leafCategories();
if (!$categories) {
return parent::searchByProximity($center, $tolerance, $maxItems);
} else {
$results = array();
foreach ($categories as $category) {
$this->retriever->setSelectedLayer($category->getId());
$results = array_merge($results, parent::searchByProximity($center, $tolerance, $maxItems));
}
}
$this->retriever->setSaveMemory(false);
return $results;
}
