private int[][] getPwmByName(String tfbsName, ArrayList<RegulatoryElementPWM> pwms) {
   for (Iterator<RegulatoryElementPWM> iterator = pwms.iterator(); iterator.hasNext(); ) {
     RegulatoryElementPWM tfbsPWM = (RegulatoryElementPWM) iterator.next();
     if (tfbsPWM.getName().equals(tfbsName)) {
       return tfbsPWM.getPwm();
     }
   }
   return null;
 }