getSession
Return the HTTP Session object instance.
General format
Object getSession( )
General rules
1. The returned object should be cast to javax.servlet.http.HttpSession.
Example
Retrieve the unique ID of the current HTTP session:
 repository.
     class HTTPHandler as "com.iscobol.rts.HTTPHandler"
     class HTTPSession as "javax.servlet.http.HttpSession"
     .
 working-storage section.
 77 servlet-session object reference HTTPSession.
 77 unique-id pic x any length.
 linkage section.
 77 http-handler object reference HTTPHandler.
 procedure division using http-handler.
     set servlet-session to http-handler:>getSession()
                         as HTTPSession.
     set unique-id to servlet-session:>getId().