code: private static String expand(final String value) {
          // shortcut if value does not contain any properties
          if (value.contains("${") == false) {
              return value;
          }
  //        return AccessController.doPrivileged(new PrivilegedAction<String>() {
  //            public String run() {
                  try {
                      return PropertyExpander.expand(value);
                  } catch (GeneralSecurityException e) {
                      throw new ProviderException(e);
                  }
  //            }
  //        });
      }
docs: Perform property expansion of the provider value.
  
  NOTE use of doPrivileged().