ProgramNode(0...10)(
  [],
  StatementsNode(0...10)(
    [CallNode(0...10)(
       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
       (1...2),
       (2...3),
       (3...4),
       ArgumentsNode(4...8)(
         [KeywordHashNode(4...8)(
            [AssocNode(4...8)(
               IntegerNode(4...5)(),
               IntegerNode(7...8)(),
               (5...7)
             )]
          )]
       ),
       (9...10),
       nil,
       0,
       "f"
     )]
  )
)
