=========
Includes
=========

#include "foo.bar"
#include "qux.ligo"

---

(source_file
  (include
    (string))
  (include
    (string)))

=========
Functions
=========

function add (const a : int ; const b : int) : int is
  block { skip } with 1

---

(source_file
  (include
    (string))
  (include
    (string)))