code: public static int getLength(final List<TagAndLength> pList) {
  		int ret = 0;
  		if (pList != null) {
  			for (TagAndLength tl : pList) {
  				ret += tl.getLength();
  			}
  		}
  		return ret;
  	}
docs: Method used to get length of all Tags
  
  @param pList
  tag length list
  @return the sum of tag length