src/Request.php
public function buildSignature(SignatureMethod $signatureMethod, Consumer $consumer, Token $token = null)
    {
        return $signatureMethod->buildSignature($this, $consumer, $token);
    }
public function buildSignature(SignatureMethod $signatureMethod, Consumer $consumer, Token $token = null)
    {
        return $signatureMethod->buildSignature($this, $consumer, $token);
    }
@param SignatureMethod $signatureMethod
@param Consumer        $consumer
@param Token           $token

@return string