code: public function clientPermRemove($cldbid, $permid)
      {
          return $this->getParent()->channelClientPermRemove($this->getId(), $cldbid, $permid);
      }
docs: Removes a set of specified permissions from a client in the channel. Multiple permissions can be removed at once.
  
  @param  integer $cldbid
  @param  integer $permid
  @return void