anchor.diff:          VoidTypeBuilder;
   
   import '../loader.dart' show Loader;
  +
  +import '../parser.dart' show FormalParameterKind;
   
   class TypeBuilderComputer implements DartTypeVisitor<KernelTypeBuilder> {
     final Loader<Library> loader;
  
positive.code:     return new KernelNamedTypeBuilder(cls.name, arguments)..bind(cls);
    }
  
    KernelTypeBuilder visitFunctionType(FunctionType node) {
      throw "Not implemented";
    }
  
    KernelTypeBuilder visitTypeParameterType(TypeParameterType node) {
  
negative.code:     show
          DynamicTypeBuilder,
          KernelClassBuilder,
          KernelFormalParameterBuilder,
          KernelFunctionTypeBuilder,
          KernelNamedTypeBuilder,
          KernelTypeBuilder,
          KernelTypeVariableBuilder,
  