@SequenceStyle(Type.GENERATED_FIXED_WITH_OPTIONAL_TAIL)
    public SequenceB1 getSequenceB1(SwiftTagListBlock parentSequence) {
        if (parentSequence != null && !parentSequence.isEmpty()) {
            final SwiftTagListBlock content = parentSequence.getSubBlockDelimitedWithOptionalTail(SequenceB1.START, SequenceB1.END, SequenceB1.TAIL);
            if (log.isLoggable(java.util.logging.Level.FINE)) {