code: func (f *Fpdf) SetTitle(titleStr string, isUTF8 bool) {
  	if isUTF8 {
  		titleStr = utf8toutf16(titleStr)
  	}
  	f.title = titleStr
  }
docs: // SetTitle defines the title of the document. isUTF8 indicates if the string
  // is encoded in ISO-8859-1 (false) or UTF-8 (true).