How can I use the function:
https://github.com/quickfixgo/quickfix/blob/master/field_map.go#L150
Has anybody got an example code snippet showing how to implement the FieldGroupReader interface?
Many thanks
Most likely you should be using one of the pre-defined implementation. Such as https://godoc.org/github.com/quickfixgo/quickfix/fix44/massquote#NoPartyIDsRepeatingGroup
If you want to implement a non-standard group you can follow e.g. https://github.com/quickfixgo/quickfix/blob/102166066b60662e45cc963e405d281cd3e20101/fix44/massquote/MassQuote.generated.go#L3895