ProgramNode(0...12)(
  [],
  StatementsNode(0...12)(
    [CallNode(0...6)(
       ArrayNode(0...4)([], (0...3), (3...4)),
       (4...5),
       (5...6),
       nil,
       nil,
       nil,
       nil,
       0,
       "b"
     ),
     CallNode(8...12)(
       ArrayNode(8...10)([], (8...9), (9...10)),
       (10...11),
       (11...12),
       nil,
       nil,
       nil,
       nil,
       0,
       "b"
     )]
  )
)
