anchor.diff:  interface Dynamic {}
   interface Null {}
   assert() {}
  +class Math {
  +  static double parseDouble(String s) => 1.0;
  +}
   ''';
   
   testDart2Dart(String src, [void continuation(String s)]) {
  
positive.code:   testNativeMethods();
    testPrefixIncrements();
    testConstModifier();
    testSimpleFileUnparse();
    testSimpleObjectInstantiation();
    testSimpleTopLevelClass();
  
negative.code:       (String result) { Expect.equals(expectedResult, result); });
  }
  
  testStaticInvocation() {
    testDart2Dart('main(){var x=Math.parseDouble("1");}');
  }
  
  main() {
    testSignedConstants();
    testGenericTypes();
  