private String attachmentContentType(WSDLBindingOperationMessage message,
String partName)
{
for (Object o : _bindingOperation.getInput().getAny()) {
if (o instanceof MIMEMultipartRelated) {
MIMEMultipartRelated related = (MIMEMultipartRelated) o;
for (MIMEPart part : related.getParts()) {
for (Object subpart : part.getAny()) {
if (subpart instanceof MIMEContentType) {
MIMEContentType content = (MIMEContentType) subpart;