wp-includes/SimplePie/src/Item.php:393Get a category for the item
$keyintoptional0SimplePie\Category|null public function get_category($key = 0) { $categories = $this->get_categories(); if (isset($categories[$key])) { return $categories[$key]; } return null; }Introduced in Beta 3 (previously called <code>get_categories()</code> since Beta 2). Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/SimplePie/src/Item.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.