public void addToBeLoaded(final String url){
  if (toBeLoaded == null) {
    toBeLoaded=new ArrayList<String>();
  }
  if (StringUtils.isNotBlank(url)) {
    toBeLoaded.add(url);
  }
}

public void addToBeLoaded ( final String url ) { if ( toBeLoaded == null ) { toBeLoaded = new ArrayList < String > ( ) ; } if ( StringUtils . isNotBlank ( url ) ) { toBeLoaded . add ( url ) ; } }
this methods allows to indicate if the resource must be obtained . if this method has been invoked then only the provided url will be processed .
