docs: private static X509Certificate getReqSigCert(Message message) {
  		List<WSHandlerResult> results = 
                  CastUtils.cast((List<?>)
                      message.getExchange().getInMessage().get(WSHandlerConstants.RECV_RESULTS));
  
          if (results == null) {
          	return null;
          }
          
          /*
  		 * Scan the results for a matching actor. Use results only if the
  		 * receiving Actor and the sending Actor match.
  		 */
  		for (WSHandlerResult rResult : results) {
  			List<WSSecurityEngineResult> wsSecEngineResults = rResult
  					.getResults();
  			/*
  			 * Scan the results for the first Signature action. Use the
  			 * certificate of this Signature to set the certificate for the
  			 * encryption action :-).
  			 */
  			for (WSSecurityEngineResult wser : wsSecEngineResults) {
  				Integer actInt = (Integer) wser
  						.get(WSSecurityEngineResult.TAG_ACTION);
  				if (actInt.intValue() == WSConstants.SIGN) {
  					return (X509Certificate) wser
  							.get(WSSecurityEngineResult.TAG_X509_CERTIFICATE);
  				}
  			}
  		}
  		return null;
  	}