[
  (let)
  (binding)
  (simple_fun)
  (def)
  (arglist)
  (if)
  (if_condition)
  (if_then)
  (elsif_condition)
  (elsif_then)
  (if_else)
  (for)
  (for_do)
  (while)
  (while_do)
  (try)
  (try_body)
  (try_do)
  (block)
] @fold