/**
  * Find many posts by category.
  *
  * @param ICategory $category
  * @param null  $limit
  * @return EntryCollection
  */
 public function findManyByCategory(ICategory $category, $limit = null)
 {
     $related = $this->modelClassInstance->active()->where('category_id', $category->getId())->paginate($limit);
     return $related;
 }