/**
* Returns the enveloped Signature from the object.
*
- * @return the enveloped Signature, or NULL
+ * @return the enveloped Signature, or nullptr
*/
virtual xmlsignature::Signature* getSignature() const=0;
/**
* Sets an enveloped Signature in the object.
*
- * @param sig the enveloped Signature, or NULL
+ * @param sig the enveloped Signature, or nullptr
*/
virtual void setSignature(xmlsignature::Signature* sig)=0;