public static function get_ticket_post_types() {
		$provider_info = static::get_provider_info();
		$post_types    = [];

		foreach ( $provider_info as $provider => $provider_info ) {
			if ( empty( $provider_info['ticket_post_type'] ) ) {
				continue;
			}
			$post_types[ $provider ] = $provider_info['ticket_post_type'];
		}

		return $post_types;
	}