code: public int getSrcSetMaxWidth() {
  
          int result = 0;
          if ((m_srcSet != null) && (m_srcSet.size() > 0)) {
  
              result = m_srcSet.lastKey().intValue();
          }
          return result;
      }
docs: Returns the largest width value form the source set.<p>
  
  In case no source set entries have been added before, the map is not initialized and <code>0</code> is returned.
  
  @return the largest width value form the source set