package Ġcom . micro services . chapter 4 čĊč Ċ import Ġreactor . core . publisher . Flux č Ċ import Ġreactor . core . publisher . Mono čĊč Ċ interface ĠCustomer Service Ġ{ čĊĠ Ġfun Ġget Customer ( id : ĠInt ): ĠMono < Customer > čĊĠ Ġfun Ġsearch Customers ( name Filter : ĠString ): ĠFlux < Customer > čĊĠ Ġfun Ġcreate Customer ( customer Mono : ĠMono < Customer >): ĠMono < Customer > č Ċ } čĊ