* SSA 7.1.2 requestURI, Call-ID, From, To, CSeq and Route headers
*/
public SipServletRequest createRequest(String method) {
checkCreateRequestMethodValidity(method);
SipServletRequest result = (getState() == State.INITIAL) ? createRequestInitial(method)
: createRequestCommitted(method);
if (getDF() != null)
getDF().getDialogLifeCycle().initUnitOfWork();
return result;
}