(source [0, 0] - [1, 0]
  (struct_lit [0, 0] - [0, 11]
    (kwd_lit [0, 1] - [0, 3])
    (num_lit [0, 4] - [0, 5])
    (kwd_lit [0, 6] - [0, 8])
    (num_lit [0, 9] - [0, 10])))
