public static boolean isSystemGroup(String group) {
        if (StringUtils.isBlank(group)) {
            return false;
        }
        String groupInLowerCase = group.toLowerCase();
        for (String prefix : SYSTEM_GROUP_PREFIX_LIST) {
            if (groupInLowerCase.startsWith(prefix)) {
                return true;
            }
        }
        return false;
    }
@Test
    public void testIsSystemGroup_NonSystemGroup_ReturnsFalse() {
        String group = "FooGroup";
        boolean result = BrokerMetricsManager.isSystemGroup(group);
        assertThat(result).isFalse();
    }