eventespresso / event-espresso-core

	static public function convert_data_from_persistent_storage( $data ) {

		$registration = null;

		//$data['Registration'] could be either an ID (back compat) or a registration object (prepped using old system).

		if ( isset( $data[ 'Registration' ] ) ) {

			$registration = $data[ 'Registration' ] instanceof EE_Registration

				? $data[ 'Registration' ]

				: EEM_Registration::instance()->get_one_by_ID( $data[ 'Registration' ] );

		}

		$prepped_data = array(

			0 => $registration,

			1 => isset( $data['filter'] ) ? $data['filter'] : null

                 : '';

	         throw new InvalidSessionDataException($msg);

         }

	     if ( isset($session_data['transaction'] ) && absint($session_data['transaction'] ) !== 0 ) {

             $session_data['transaction'] = EEM_Transaction::instance()->get_one_by_ID(

                 $session_data['transaction']

	         );

	     }

         return $session_data;

     }