refine for serializing recursive functions
refine for serializing recursive functions

Mignet/dpark,304471720/dpark,douban/dpark,veritynoob/dpark,quxiaolong1504/dpark,oceanjack/dpark,dogeyes/dpark,fe11x/dpark,windreamer/dpark,zzl0/dpark,dogeyes/dpark,dogeyes/dpark,yanheven/dpark,smarthomekit/dpark,junmoa/dpark,quxiaolong1504/dpark,Mignet/dpark,junmoa/dpark,fe11x/dpark,windreamer/dpark,windreamer/dpark,yhj630520/dpark,veritynoob/dpark,yhj630520/dpark,douban/dpark,304471720/dpark,daishaowei/dpark,douban/dpark,daishaowei/dpark,smarthomekit/dpark,yanheven/dpark,ee08b397/dpark,zzl0/dpark,oceanjack/dpark,mageia/dpark,yhj630520/dpark,304471720/dpark,smarthomekit/dpark,windreamer/dpark,mageia/dpark,douban/dpark,veritynoob/dpark,douban/dpark