toExportLine method
Implementation
String toExportLine() {
final meta = metadata.entries.map((e) => '${e.key}=${e.value}').join(', ');
final metaStr = meta.isEmpty ? '' : ' [$meta]';
final stStr = stackTrace != null ? '\n$stackTrace' : '';
return '$formattedTime [${level.label}] ($source) $message$metaStr$stStr';
}