================================================================================
Use
================================================================================

use <- f()

use a <- f()

use a, b, c, d, e <- f()

use #(a, b) <- blah

use x : OfType <- f()

--------------------------------------------------------------------------------

(source_file
  (use
    (function_call
      (identifier)
      (arguments)))
  (use
    (use_assignments
      (use_assignment
        (identifier)))
    (function_call
      (identifier)
      (arguments)))
  (use
    (use_assignments
      (use_assignment
        (identifier))
      (use_assignment
        (identifier))
      (use_assignment
        (identifier))
      (use_assignment
        (identifier))
      (use_assignment
        (identifier)))
    (function_call
      (identifier)
      (arguments)))
  (use
    (use_assignments
      (use_assignment
        (tuple_pattern
          (identifier)
          (identifier))))
    (identifier))
  (use
    (use_assignments
      (use_assignment
        (identifier)
        (type
          (type_identifier))))
    (function_call
      (identifier)
      (arguments))))
