@Override
    public void setTtlAttachment(@NonNull String key, Object value) {
        attachments.put(key, value);
    }
{@link TtlAttachments} delegate/implementation.

@author Jerry Lee (oldratlee at gmail dot com)
@see com.alibaba.ttl3.TtlRunnable
@see com.alibaba.ttl3.TtlCallable
ttl-core/src/main/java/com/alibaba/ttl3/spi/TtlAttachmentsDelegate.java