code: public void setupProxy() throws InvalidProxyException {
          // are we running through a proxy
          if (Property.isProxySet()) {
              // set the proxy information
              Proxy proxy = new Proxy();
              proxy.setHttpProxy(Property.getProxy());
              desiredCapabilities.setCapability(CapabilityType.PROXY, proxy);
          }
      }
docs: Obtains the set system values for the proxy, and adds them to the desired
  desiredCapabilities