assertTrue(fieldConfigs.getConfig("test").isEmpty());
        assertFalse(fieldConfigs.getConfig("foo").isEmpty());
        assertFalse(fieldConfigs.getConfig("foo").map(FieldConfigs.Config::isCache).orElse(false));
        assertFalse(fieldConfigs.getConfig("foo").map(FieldConfigs.Config::isOverwrite).orElse(false));

        public Config(final String value) {
            values = StreamUtil.split(value, Pattern.quote("|")).get(stream -> stream.map(String::trim).toArray(n -> new String[n]));
        }

        public boolean isCache() {
            for (final String value : values) {
                if ("cache".equalsIgnoreCase(value)) {
                    return true;
                }
            }
            // backward compatibility