#lang racket

(define connection%
  (class object%
    (super-new)
    (init-field input-source
                output-source)
    
    (define/public (get-input-source)
      input-source)
    (define/public (get-output-source)
      output-source)
    (define/public (get-output)
      (send output-source get-output))
    (define/public (refresh! new-items)
      (send input-source refresh! new-items)
      (send output-source refresh! new-items))))

standard-module-name-resolver: collection not found: "racket" in any of: (#<path:/usr/lib/plt/collects>)

 === context ===
cloop