code: @Override
      public void ignorableWhitespace( char[] chars, int start, int length )
          throws SAXException
      {
          characters( chars, start, length );
      }
docs: Just delegates to {@link #characters(char[], int, int)}, since this method is not called in all situations where
  it could be naively expected.
  
  @see org.xml.sax.helpers.DefaultHandler#ignorableWhitespace(char[], int, int)