}
        return parent.containsKey(toCamelCase(key));
    }

    @Override
    public boolean containsValue(final Object value) {
        return parent.containsValue(value);
    }

    @Override
    public V get(final Object key) {
        final V value = parent.get(key);
        if (value != null) {
            return value;
        }
        return parent.get(toCamelCase(key));
    }

    @Override