Comment by matthavener

In clojure, you see something similar at the bottom of files:

  (comment
    (def some-state (create-state))
    (some-fn [1 2 3])
    (do-something some-state)
  )

The compiler ignores the block, but in a REPL enabled editor, you can evaluate the forms to possibly view current state, or run functions that test behaviors or probe runtime state.