valueClass == null ? null : valueClass.getName(), valueClass == null ? null : valueClass.getClassLoader(),
                            value, targetClass == null ? null : targetClass.getName(),
                            targetClass == null ? null : targetClass.getClassLoader()),
                    e);
        }

                                    propertyName, valueClass == null ? null : valueClass.getName(),
                                    valueClass == null ? null : valueClass.getClassLoader(), convertedValue,
                                    targetClass == null ? null : targetClass.getName(),

   *
   * @param valueClass class of values stored in the returned array
   */
  @GwtIncompatible // reflection
  public @Nullable V[][] toArray(Class<V> valueClass) {
    @SuppressWarnings("unchecked") // TODO: safe?
    @Nullable V[][] copy =
        (@Nullable V[][]) Array.newInstance(valueClass, rowList.size(), columnList.size());
    for (int i = 0; i < rowList.size(); i++) {

        }
      };
    }

    /** Uses an {@link EnumSet} to store value collections. */
    public <V0 extends Enum<V0>> SetMultimapBuilder<K0, V0> enumSetValues(Class<V0> valueClass) {
      checkNotNull(valueClass, "valueClass");
      return new SetMultimapBuilder<K0, V0>() {
        @Override
        public <K extends K0, V extends V0> SetMultimap<K, V> build() {

        }
      };
    }

    /** Uses an {@link EnumSet} to store value collections. */
    public <V0 extends Enum<V0>> SetMultimapBuilder<K0, V0> enumSetValues(Class<V0> valueClass) {
      checkNotNull(valueClass, "valueClass");
      return new SetMultimapBuilder<K0, V0>() {
        @Override
        public <K extends K0, V extends V0> SetMultimap<K, V> build() {