// CHECK:
//   Mangled name: IA
//   Public signature: /IA|null[0]
interface IA {
  // CHECK JVM_IR:
  //   Mangled name: IA#get(kotlin.String){}kotlin.Int
  //   Public signature: /IA.get|8115151130332405730[0]
  //   Public signature debug description: get(kotlin.String){}kotlin.Int
  // CHECK JS_IR NATIVE:
  //   Mangled name: IA#get(kotlin.String){}
  //   Public signature: /IA.get|-2844435113185872994[0]
  //   Public signature debug description: get(kotlin.String){}
  abstract operator fun get(index: String): Int

}

// CHECK:
//   Mangled name: IB
//   Public signature: /IB|null[0]
interface IB {
  // CHECK:
  //   Mangled name: IB#set@IA(kotlin.String;kotlin.Int){}
  //   Public signature: /IB.set|-3878244067281394744[0]
  //   Public signature debug description: set@IA(kotlin.String;kotlin.Int){}
  abstract operator fun IA.set(index: String, value: Int): Unit

}

// CHECK:
//   Mangled name: #test@IB(IA){}
//   Public signature: /test|-3494937446551267445[0]
//   Public signature debug description: test@IB(IA){}
fun IB.test(a: IA): Unit