FILE fqName:<root> fileName:/boxOk.kt
  FUN name:box visibility:public modality:FINAL <> () returnType:kotlin.String flags:[]
    BLOCK_BODY
      RETURN type=kotlin.Nothing from='FUN name:box visibility:public modality:FINAL <> () returnType:kotlin.String flags:[]'
        CONST String type=kotlin.String value="OK"
