SingleByteConvert(nsFontCharSetInfo* aSelf, XFontStruct* aFont,
SingleByteConvert(nsFontCharSetXlibInfo* aSelf, XFontStruct* aFont,
SingleByteConvert(nsFontCharSetInfo* aSelf, XFontStruct* aFont,                  const PRUnichar* aSrcBuf, PRInt32 aSrcLen,                   char* aDestBuf, PRInt32 aDestLen){  int count = 0;  if (aSelf->mConverter) {    aSelf->mConverter->Convert(aSrcBuf, &aSrcLen, aDestBuf, &aDestLen);    count = aDestLen;  }  return count;}