Gp::getLetterAddress PHP Method

    public function getLetterAddress($params = array())
    {
        if (!isset($params['patient'])) {
            throw new Exception('Patient must be passed for GP contacts.');
        }
        $contact = $address = null;
        if ($params['patient']->practice) {
            if (@$params['contact']) {
                $contactRelation = $params['contact'];
                $contact = $params['patient']->practice->{$contactRelation};
            } else {
                $contact = $params['patient']->practice->contact;
            }
            $address = $contact->address;
        }
        return $this->formatLetterAddress($contact, $address, $params);
    }