begin static method
Creates a BEGIN frame
Implementation
static StompFrame begin({
required String transactionId,
String? receipt,
Map<String, String>? additionalHeaders,
}) {
final headers = <String, String>{
StompHeaders.transaction: transactionId,
};
if (receipt != null) headers[StompHeaders.receipt] = receipt;
if (additionalHeaders != null) headers.addAll(additionalHeaders);
return StompFrame(command: StompCommands.begin, headers: headers);
}