code: public final String getMethod() {
  		if(method == null) {
  			method = message instanceof Request ? ((Request) message).getMethod()
  				: ((CSeqHeader) message.getHeader(CSeqHeader.NAME)).getMethod();
  		}
  		if(logger.isDebugEnabled()) {
  			logger.debug("getMethod - return=" + method);
  		}
  		return method;
  	}
docs: /*
  (non-Javadoc)
  
  @see javax.servlet.sip.SipServletMessage#getMethod()