@ ProgramNode (location: (1,0)-(24,7))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(24,7))
    └── body: (length: 11)
        ├── @ NextNode (location: (1,0)-(1,4))
        │   ├── arguments: ∅
        │   └── keyword_loc: (1,0)-(1,4) = "next"
        ├── @ NextNode (location: (3,0)-(3,18))
        │   ├── arguments:
        │   │   @ ArgumentsNode (location: (3,5)-(3,18))
        │   │   ├── flags: ∅
        │   │   └── arguments: (length: 3)
        │   │       ├── @ ParenthesesNode (location: (3,5)-(3,8))
        │   │       │   ├── body:
        │   │       │   │   @ StatementsNode (location: (3,6)-(3,7))
        │   │       │   │   └── body: (length: 1)
        │   │       │   │       └── @ IntegerNode (location: (3,6)-(3,7))
        │   │       │   │           └── flags: decimal
        │   │       │   ├── opening_loc: (3,5)-(3,6) = "("
        │   │       │   └── closing_loc: (3,7)-(3,8) = ")"
        │   │       ├── @ ParenthesesNode (location: (3,10)-(3,13))
        │   │       │   ├── body:
        │   │       │   │   @ StatementsNode (location: (3,11)-(3,12))
        │   │       │   │   └── body: (length: 1)
        │   │       │   │       └── @ IntegerNode (location: (3,11)-(3,12))
        │   │       │   │           └── flags: decimal
        │   │       │   ├── opening_loc: (3,10)-(3,11) = "("
        │   │       │   └── closing_loc: (3,12)-(3,13) = ")"
        │   │       └── @ ParenthesesNode (location: (3,15)-(3,18))
        │   │           ├── body:
        │   │           │   @ StatementsNode (location: (3,16)-(3,17))
        │   │           │   └── body: (length: 1)
        │   │           │       └── @ IntegerNode (location: (3,16)-(3,17))
        │   │           │           └── flags: decimal
        │   │           ├── opening_loc: (3,15)-(3,16) = "("
        │   │           └── closing_loc: (3,17)-(3,18) = ")"
        │   └── keyword_loc: (3,0)-(3,4) = "next"
        ├── @ NextNode (location: (5,0)-(5,6))
        │   ├── arguments:
        │   │   @ ArgumentsNode (location: (5,5)-(5,6))
        │   │   ├── flags: ∅
        │   │   └── arguments: (length: 1)
        │   │       └── @ IntegerNode (location: (5,5)-(5,6))
        │   │           └── flags: decimal
        │   └── keyword_loc: (5,0)-(5,4) = "next"
        ├── @ NextNode (location: (7,0)-(8,1))
        │   ├── arguments:
        │   │   @ ArgumentsNode (location: (7,5)-(8,1))
        │   │   ├── flags: ∅
        │   │   └── arguments: (length: 3)
        │   │       ├── @ IntegerNode (location: (7,5)-(7,6))
        │   │       │   └── flags: decimal
        │   │       ├── @ IntegerNode (location: (7,8)-(7,9))
        │   │       │   └── flags: decimal
        │   │       └── @ IntegerNode (location: (8,0)-(8,1))
        │   │           └── flags: decimal
        │   └── keyword_loc: (7,0)-(7,4) = "next"
        ├── @ NextNode (location: (10,0)-(10,12))
        │   ├── arguments:
        │   │   @ ArgumentsNode (location: (10,5)-(10,12))
        │   │   ├── flags: ∅
        │   │   └── arguments: (length: 3)
        │   │       ├── @ IntegerNode (location: (10,5)-(10,6))
        │   │       │   └── flags: decimal
        │   │       ├── @ IntegerNode (location: (10,8)-(10,9))
        │   │       │   └── flags: decimal
        │   │       └── @ IntegerNode (location: (10,11)-(10,12))
        │   │           └── flags: decimal
        │   └── keyword_loc: (10,0)-(10,4) = "next"
        ├── @ NextNode (location: (12,0)-(12,14))
        │   ├── arguments:
        │   │   @ ArgumentsNode (location: (12,5)-(12,14))
        │   │   ├── flags: ∅
        │   │   └── arguments: (length: 1)
        │   │       └── @ ArrayNode (location: (12,5)-(12,14))
        │   │           ├── flags: ∅
        │   │           ├── elements: (length: 3)
        │   │           │   ├── @ IntegerNode (location: (12,6)-(12,7))
        │   │           │   │   └── flags: decimal
        │   │           │   ├── @ IntegerNode (location: (12,9)-(12,10))
        │   │           │   │   └── flags: decimal
        │   │           │   └── @ IntegerNode (location: (12,12)-(12,13))
        │   │           │       └── flags: decimal
        │   │           ├── opening_loc: (12,5)-(12,6) = "["
        │   │           └── closing_loc: (12,13)-(12,14) = "]"
        │   └── keyword_loc: (12,0)-(12,4) = "next"
        ├── @ NextNode (location: (14,0)-(17,1))
        │   ├── arguments:
        │   │   @ ArgumentsNode (location: (14,4)-(17,1))
        │   │   ├── flags: ∅
        │   │   └── arguments: (length: 1)
        │   │       └── @ ParenthesesNode (location: (14,4)-(17,1))
        │   │           ├── body:
        │   │           │   @ StatementsNode (location: (15,2)-(16,3))
        │   │           │   └── body: (length: 2)
        │   │           │       ├── @ IntegerNode (location: (15,2)-(15,3))
        │   │           │       │   └── flags: decimal
        │   │           │       └── @ IntegerNode (location: (16,2)-(16,3))
        │   │           │           └── flags: decimal
        │   │           ├── opening_loc: (14,4)-(14,5) = "("
        │   │           └── closing_loc: (17,0)-(17,1) = ")"
        │   └── keyword_loc: (14,0)-(14,4) = "next"
        ├── @ NextNode (location: (19,0)-(19,4))
        │   ├── arguments: ∅
        │   └── keyword_loc: (19,0)-(19,4) = "next"
        ├── @ IntegerNode (location: (20,0)-(20,1))
        │   └── flags: decimal
        ├── @ NextNode (location: (22,0)-(22,6))
        │   ├── arguments:
        │   │   @ ArgumentsNode (location: (22,4)-(22,6))
        │   │   ├── flags: ∅
        │   │   └── arguments: (length: 1)
        │   │       └── @ ParenthesesNode (location: (22,4)-(22,6))
        │   │           ├── body: ∅
        │   │           ├── opening_loc: (22,4)-(22,5) = "("
        │   │           └── closing_loc: (22,5)-(22,6) = ")"
        │   └── keyword_loc: (22,0)-(22,4) = "next"
        └── @ NextNode (location: (24,0)-(24,7))
            ├── arguments:
            │   @ ArgumentsNode (location: (24,4)-(24,7))
            │   ├── flags: ∅
            │   └── arguments: (length: 1)
            │       └── @ ParenthesesNode (location: (24,4)-(24,7))
            │           ├── body:
            │           │   @ StatementsNode (location: (24,5)-(24,6))
            │           │   └── body: (length: 1)
            │           │       └── @ IntegerNode (location: (24,5)-(24,6))
            │           │           └── flags: decimal
            │           ├── opening_loc: (24,4)-(24,5) = "("
            │           └── closing_loc: (24,6)-(24,7) = ")"
            └── keyword_loc: (24,0)-(24,4) = "next"