channel method
Implementation
String channel() {
if (this == ChannelEnum.heartBeat) return 'heartbeat';
if (this == ChannelEnum.status) return 'status';
if (this == ChannelEnum.ticker) return 'ticker';
if (this == ChannelEnum.level2) return 'level2';
if (this == ChannelEnum.user) return 'user';
if (this == ChannelEnum.matches) return 'matches';
if (this == ChannelEnum.full)
return 'full';
else
return 'auction';
}