protected function getSip() {
        if (!$this->_sip) {
            $this->_sip = new SipList($this->version, $this->solution['sid']);
        }

        return $this->_sip;
    }
protected function getSip() {
        if (!$this->_sip) {
            $this->_sip = new SipList($this->version, $this->solution['sid']);
        }

        return $this->_sip;
    }
protected function getSip ( ) { if ( ! $ this -> _sip ) { $ this -> _sip = new SipList ( $ this -> version , $ this -> solution [ 'sid' ] ) ; } return $ this -> _sip ; }
Access the sip

@return \Twilio\Rest\Api\V2010\Account\SipList
Access the sip