private function getSigningSecret()
    {
        $secret = $this->getConsumerSecret().'&';

        if (null !== $token_secret = $this->getTokenSecret()) {
            $secret .= $token_secret;
        }

        return $secret;
    }
private function getSigningSecret()
    {
        $secret = $this->getConsumerSecret().'&';

        if (null !== $token_secret = $this->getTokenSecret()) {
            $secret .= $token_secret;
        }

        return $secret;
    }
private function getSigningSecret ( ) { $ secret = $ this -> getConsumerSecret ( ) . '&' ; if ( null !== $ token_secret = $ this -> getTokenSecret ( ) ) { $ secret .= $ token_secret ; } return $ secret ; }
This is the signing secret passed to HMAC and PLAINTEXT signing mechanisms.

@return string
This is the signing secret passed to HMAC and PLAINTEXT signing mechanisms .