public function setId($givenId)
    {
        if (!isset($this->id)) {
            $this->id = $givenId;
        }
        return $this->id;
    }
public function setId($givenId)
    {
        if (!isset($this->id)) {
            $this->id = $givenId;
        }
        return $this->id;
    }
public function setId ( $ givenId ) { if ( ! isset ( $ this -> id ) ) { $ this -> id = $ givenId ; } return $ this -> id ; }
Set id of model.

@return int|string
Set id of model .