learndash_get_post_type_slug( $type )

	function learndash_get_post_type_slug($type) {
		$postTypes = [
			'course'       => 'sfwd-courses',
			'lesson'       => 'sfwd-lessons',
			'topic'        => 'sfwd-topic',
			'quiz'         => 'sfwd-quiz',
			'question'     => 'sfwd-question',
			'transactions' => 'sfwd-transactions',
			'group'        => 'groups',
			'assignment'   => 'sfwd-assignment',
			'essays'       => 'sfwd-essays',
			'certificates' => 'sfwd-certificates',
		];

		return $postTypes[$type];
	}