return map;
          }

          @Override
          public Set<String> keySet() {
            return new StandardKeySet();
          }
        };
    callAllPublicMethods(new TypeToken<Set<String>>() {}, forward.keySet());

    // These are the methods specified by StandardKeySet
    verify(map, atLeast(0)).clear();
    verify(map, atLeast(0)).containsKey(any());
    verify(map, atLeast(0)).isEmpty();