I pasted Category.php file in my module Helper folder
public function getStoreCategories($sorted = false, $asCollection = true, $toLoad = true)
{
$parent = $this->_storeManager->getStore()->getRootCategoryId();
$cacheKey = sprintf('%d-%d-%d-%d', $parent, $sorted, $asCollection, $toLoad);
if (isset($this->_storeCategories[$cacheKey])) {
return $this->_storeCategories[$cacheKey];
}
/**
* Check if parent node of the store still exists
*/
$category = $this->_categoryFactory->create();
/* @var $category ModelCategory */
if (!$category->checkId($parent)) {
if ($asCollection) {
return $this->_dataCollectionFactory->create();
}
return [];
}
$recursionLevel = max(
0,
(int)$this->scopeConfig->getValue(
'catalog/navigation/max_depth',
\Magento\Store\Model\ScopeInterface::SCOPE_STORE
)
);
$storeCategories = $category->getCategories($parent, $recursionLevel, $sorted, $asCollection, $toLoad);
$this->_storeCategories[$cacheKey] = $storeCategories;
return $storeCategories;
}
but can’t filgure out how to get only parent category by id.