fromString static method
Creates PrinterLanguage from string
Implementation
static PrinterLanguage fromString(String? language) {
if (language == null) return PrinterLanguage.unknown;
final lower = language.toLowerCase();
if (lower.contains('zpl')) return PrinterLanguage.zpl;
if (lower.contains('cpcl')) return PrinterLanguage.cpcl;
return PrinterLanguage.unknown;
}