package Ġderive an . upgrade . u 2 0 2 0 _ 1 1 _ 1 6 . storage . tables Ċ Ċ import Ġorg . jetbrains . ex posed . dao . id . UUID Table Ċ import Ġorg . jetbrains . ex posed . sql . Reference Option Ċ Ċ object ĠBuilding Attribute Table Ġ: ĠUUID Table (" building - attribute ") Ġ{ Ċ ĉ val Ġbuilding Ġ= Ġreference (" building ", ĠBuilding Table , ĠReference Option . CASCADE , ĠReference Option . CASCADE ) Ċ ĉ val Ġattribute Ġ= Ġreference (" attribute ", ĠAttribute Table , ĠReference Option . CASCADE , ĠReference Option . CASCADE ) Ċ } Ċ