code: public SipServletRequest createRequest(SipServletRequest origRequest,
  			boolean sameCallId) {		
  		SipServletRequest sipServletRequest = sipFactoryImpl.createRequest(origRequest, sameCallId);
  		checkHandler(sipServletRequest);		
  		return sipServletRequest;
  	}
docs: /* (non-Javadoc)
  @see javax.servlet.sip.SipFactory#createRequest(javax.servlet.sip.SipServletRequest, boolean)