if(cs == null && !extendedLoaded)
if (cs == null)
  public Charset charsetForName (String charsetName)  {    Charset cs = (Charset) charsets.get(canonicalNames.get(charsetName.toLowerCase()));    if(cs == null && !extendedLoaded)  {       loadExtended();       cs = (Charset) charsets.get(canonicalNames.get(charsetName.toLowerCase()));     }    return cs;  }