public static boolean isBooleanOptionSet(@NonNull String key, boolean defaultValueIfKeyAbsent) {
        return TtlAgentHelper.isBooleanOptionSet(kvs, key, defaultValueIfKeyAbsent);
    }
Generic Option Getters for {@code boolean type} option.

@see TtlAgent
ttl-agent/src/main/java/com/alibaba/ttl3/agent/TtlAgent.java