@Override
      public void visitTryCatchBlock(Label start, Label end, Label handler, String type) {
        if (type != null) {
          Iterators.collect(new TypeRepr.ClassType(type).getUsages(), myUsages);
        }
        super.visitTryCatchBlock(start, end, handler, type);
      }
@Override
      public void visitTryCatchBlock(Label start, Label end, Label handler, String type)