Inheritance: IGrammar
 public FixtureWithExplicits()
 {
     this["a"] = new StubGrammar();
     this["b"] = new StubGrammar();
     this["c"] = new StubGrammar();
 }
 public FixtureWithExplicits()
 {
     this["a"] = new StubGrammar();
     this["b"] = new StubGrammar();
     this["c"] = new StubGrammar();
 }