public function get_attachments( $attachments = [] ): array {
		/**
		 * Filter the attachments.
		 *
		 * @since 5.5.9
		 *
		 * @param array          $attachments The attachments.
		 * @param string         $id          The email ID.
		 * @param Email_Abstract $this        The email object.
		 */
		$attachments = apply_filters( 'tec_tickets_emails_attachments', $attachments, $this->id, $this );

		/**
		 * Filter the attachments for the particular email.
		 *
		 * @since 5.5.10
		 *
		 * @param array          $attachments The attachments.
		 * @param string         $id          The email ID.
		 * @param Email_Abstract $this        The email object.
		 */
		$attachments = apply_filters( "tec_tickets_emails_{$this->slug}_attachments", $attachments, $this->id, $this );

		return $attachments;
	}