package Ġcom . github . yu iz ho . decorator Ċ Ċ abstract Ġclass ĠCon dim ent Decorator Ġ: ĠBe verage () Ċ Ċ class ĠMo cha ( val Ġbe verage : ĠBe verage ) Ġ: ĠCon dim ent Decorator () Ġ{ ĊĠĠĠ Ġoverride Ġval Ġdescription Ġ= Ġ"${ be verage . description }, ĠMo cha " ĊĠĠĠ Ġoverride Ġfun Ġcost (): ĠDouble Ġ= Ġbe verage . cost () Ġ+ Ġ. 2 0 Ċ }