anchor.diff:    void initialize([serialization$DeserializationContextImpl context]) {}
   }
   
  -class serialization$NativeMap {
  +class serialization$NativeMap implements dart$$Basic {
     get(id) {}
     void put(id, instanceOrPartial) {}
     contains(id) {}
  
positive.code: // ($dart$core.print outputs newlines)
  $dart$core.StringBuffer _$outputBuffer = new $dart$core.StringBuffer();
  
  class process_ {
    const process_.$value$();
  
    $dart$core.String readLine() {
  
negative.code: // Float.dart
  //
  
  class Float implements dart$$Object, Number, Exponentiable {
    final $dart$core.double _value;
  
    Float($dart$core.double this._value);
  