Channel: ensure that we either have a topChannel or a subChannels collection
Channel: ensure that we either have a topChannel or a subChannels collection

Zirpon/tchannel,sasa233/tchannel,chenwenbin928/tchannel,Zirpon/tchannel,bunnyblue/tchannel,Zirpon/tchannel,benfleis/tchannel,benfleis/tchannel,i/tchannel,hustxiaoc/tchannel,benfleis/tchannel,RyanTech/tchannel,vanloswang/tchannel,i/tchannel,chenwenbin928/tchannel,i/tchannel,vanloswang/tchannel,savaki/tchannel,RyanTech/tchannel,savaki/tchannel,sasa233/tchannel,RyanTech/tchannel,sasa233/tchannel,bunnyblue/tchannel,bunnyblue/tchannel,savaki/tchannel,hustxiaoc/tchannel,hustxiaoc/tchannel,vanloswang/tchannel,chenwenbin928/tchannel