public static boolean isBooleanOptionSet(@NonNull String key) {
        return isBooleanOptionSet(key, false);
    }
Generic Option Getters for {@code boolean type} option.
<p>
Same as {@code isBooleanOptionSet(key, false)}.

@see #isBooleanOptionSet(String, boolean)
@see TtlAgent
ttl-agent/src/main/java/com/alibaba/ttl3/agent/TtlAgent.java