anchor.diff:  getPrivateGlobalMethodValue(LibraryMirror lib) {
     for (Symbol symbol in lib.declarations.keys) {
       DeclarationMirror decl = lib.declarations[symbol];
  -    if (decl is MethodMirror && decl.isRegularMethod) {
  +    if (decl is MethodMirror && decl.isRegularMethod && decl.isPrivate) {
         return lib.invoke(symbol, []).reflectee;
       }
     }
  
positive.code: getPrivateFieldValue(InstanceMirror cls) {
    for (Symbol symbol in cls.type.declarations.keys) {
      DeclarationMirror decl = cls.type.declarations[symbol];
      if (decl is VariableMirror) {
        return cls.getField(symbol).reflectee;
      }
    }
  
negative.code: getPrivateGlobalFieldValue(LibraryMirror lib) {
    for (Symbol symbol in lib.declarations.keys) {
      DeclarationMirror decl = lib.declarations[symbol];
      if (decl is VariableMirror && decl.isPrivate) {
        return lib.getField(symbol).reflectee;
      }
    }
  