code: public SipServletRequest createRequest(SipApplicationSession appSession,
  			String method, Address from, Address to) {
  		SipServletRequest sipServletRequest = sipFactoryImpl.createRequest(appSession, method, from, to, ((MobicentsSipApplicationSession)appSession).getCurrentRequestHandler(), null, null);
  		return sipServletRequest;
  	}
docs: /* (non-Javadoc)
  @see javax.servlet.sip.SipFactory#createRequest(javax.servlet.sip.SipApplicationSession, java.lang.String, javax.servlet.sip.Address, javax.servlet.sip.Address)