function isMediaQuery(stylesheet) {
        if (!stylesheet) {
            if(DEBUG) $log.error('No stylesheet provided');
            return;
        }
        return !!(
          // Check for media query setting
          stylesheet.media
          // Check for media queries to be ignored
          && (mediaQueriesToIgnore.indexOf(stylesheet.media) === -1)
          // Check for matchMedia support
          && $window.matchMedia
        );
      }
Is Media Query: checks for media settings, media queries to be ignore and match media support