public function Master_Get($masterId) {
        $ret = false;

        if (is_int($masterId) === true) {
            try {
                $ret = $this->_call_api('get', "{$this->_url}/masters/$masterId", array());
                $ret = $this->_Type_Safe_Yesmail_Master($ret);
                $ret->id = (int) $masterId; // Add id to object for easy reference
            } catch (\Exception $e) {
                if( $e->getCode() === 404){
                    $ret = false;
                } else {
                    throw $e;
                }
            }
        }

        return $ret;
    }