LetterMacro::afterFind PHP Method

    public function afterFind()
    {
        if ($this->site_id) {
            $this->type = 'site';
        } elseif ($this->subspecialty_id) {
            $this->type = 'subspecialty';
        } elseif ($this->firm_id) {
            $this->type = 'firm';
        }
    }