FILE fqName:<root> fileName:/implicitCastOnPlatformType.kt
  FUN name:test visibility:public modality:FINAL <> () returnType:String flags:
    BLOCK_BODY
      RETURN type=kotlin.Nothing from='test(): String'
        TYPE_OP type=kotlin.String origin=IMPLICIT_NOTNULL typeOperand=kotlin.String
          typeOperand: CLASS IR_EXTERNAL_DECLARATION_STUB CLASS name:String modality:FINAL visibility:public flags:
          CALL 'getProperty(String!): String!' type=kotlin.String! origin=null
            key: CONST String type=kotlin.String value=test

