Improve DX when working with wrong property info

Obviously I'm doing something wrong while testing data types with wsclient, but Rules should not end up in a fatal error. Code fragment in rules.core.inc:

  public function applyDataSelector($selector) {
    $parts = explode(':', str_replace('-', '_', $selector), 2);
    if (($vars = $this->availableVariables()) && isset($vars[$parts[0]]['type'])) {
      $data = NULL;
      $wrapper = rules_wrap_data($data, $vars[$parts[0]], TRUE);
      if (count($parts) > 1 && $wrapper instanceof EntityMetadataWrapper) {
        try {
          foreach (explode(':', $parts[1]) as $name) {
            $wrapper = $wrapper->get($name);
          }
        }
        // In case of an exception or we were unable to get a wrapper, return FALSE.
        catch (EntityMetadataWrapperException $e) {
          return FALSE;
        }
      }
    }
    return isset($wrapper) ? $wrapper : FALSE;
  }

EntityMetadataWrapper does not implement a get() method, so the instanceof check is wrong here. Only EntityStructureWrapper and EntityListWrapper implement a get() method, so should we check for that instead?