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(let ((val (session:page-get s:session key)))
(session:del! s:session "*sessionvars*" key)
val))
(define (s:session-var-del! key)
(session:del! s:session "*sessionvars*" key))
;; utility to get all vars as hash table
(define (s:session-get-sessionvars)
(sdat-get-sessionvars s:session))
;;
;; inputs
(define (s:get-input key)
(session:get-input s:session key))
(define (s:load-model model)
(session:load-model s:session model))
(define (s:model-path model)
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