in v2/marshaller.go [32:40]
func (j *DefaultJSONMarshaller) Marshal(mb MessageBody) (*azservicebus.Message, error) {
JSONContentType := j.ContentType()
str, err := json.Marshal(mb)
if err != nil {
return nil, err
}
return &azservicebus.Message{Body: str, ContentType: &JSONContentType}, nil
}