Evaluation of environment args

[JustusAdam]

Currently I was simply calling eval on environment args to get the value.
However that does not work when we have a local binding as argument.

(deftest arguments-outside
  "testing the detection of arguments"
  []
  (let [an-arg [1 2 3]
        type an-arg]
    (expect-op-arc-count
      (let [out-1 (accept "port01")
            out-2 (accept 9080)]
        (read out-1 out-2 an-arg)) ; references local arg `an-arg`
      ; 3 ops + 2 arcs + 3 env arcs
      3
      5)))

We need a strategy for supporting local arguments.
We could change the code generation, but I'd prefer to find a different way.