Searches parent category children for the given title (case independent).

        :param str parent_alias:
        :param str title:
        :rtype: Category|None
        :return: None if not found; otherwise - found Category

def find_category(self, parent_alias, title):
        """Searches parent category children for the given title (case independent).

        :param str parent_alias:
        :param str title:
        :rtype: Category|None
        :return: None if not found; otherwise - found Category
        """
        found = None
        child_ids = self.get_child_ids(parent_alias)
        for cid in child_ids:
            category = self.get_category_by_id(cid)
            if category.title.lower() == title.lower():
                found = category
                break
        return found