function isChannel(alias, id) {
  if (alias === 'local' && id == -99) {
    return true;
  }if (alias === 'private' && (id == 0 || id == -3)) {
    return true;
  }return false;
}
[Check if a object is channel object]
@param  {String}  alias [The channel type]
@param  {Int}     id    [The channel ID]
@return {Boolean}