@ ProgramNode (location: (1,0)-(23,9))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(23,9))
    └── body: (length: 10)
        ├── @ ReturnNode (location: (1,0)-(1,6))
        │   ├── flags: ∅
        │   ├── keyword_loc: (1,0)-(1,6) = "return"
        │   └── arguments: ∅
        ├── @ ReturnNode (location: (3,0)-(3,20))
        │   ├── flags: ∅
        │   ├── keyword_loc: (3,0)-(3,6) = "return"
        │   └── arguments:
        │       @ ArgumentsNode (location: (3,7)-(3,20))
        │       ├── flags: ∅
        │       └── arguments: (length: 3)
        │           ├── @ ParenthesesNode (location: (3,7)-(3,10))
        │           │   ├── body:
        │           │   │   @ StatementsNode (location: (3,8)-(3,9))
        │           │   │   └── body: (length: 1)
        │           │   │       └── @ IntegerNode (location: (3,8)-(3,9))
        │           │   │           ├── flags: decimal
        │           │   │           └── value: 1
        │           │   ├── opening_loc: (3,7)-(3,8) = "("
        │           │   └── closing_loc: (3,9)-(3,10) = ")"
        │           ├── @ ParenthesesNode (location: (3,12)-(3,15))
        │           │   ├── body:
        │           │   │   @ StatementsNode (location: (3,13)-(3,14))
        │           │   │   └── body: (length: 1)
        │           │   │       └── @ IntegerNode (location: (3,13)-(3,14))
        │           │   │           ├── flags: decimal
        │           │   │           └── value: 2
        │           │   ├── opening_loc: (3,12)-(3,13) = "("
        │           │   └── closing_loc: (3,14)-(3,15) = ")"
        │           └── @ ParenthesesNode (location: (3,17)-(3,20))
        │               ├── body:
        │               │   @ StatementsNode (location: (3,18)-(3,19))
        │               │   └── body: (length: 1)
        │               │       └── @ IntegerNode (location: (3,18)-(3,19))
        │               │           ├── flags: decimal
        │               │           └── value: 3
        │               ├── opening_loc: (3,17)-(3,18) = "("
        │               └── closing_loc: (3,19)-(3,20) = ")"
        ├── @ ReturnNode (location: (5,0)-(5,9))
        │   ├── flags: ∅
        │   ├── keyword_loc: (5,0)-(5,6) = "return"
        │   └── arguments:
        │       @ ArgumentsNode (location: (5,7)-(5,9))
        │       ├── flags: ∅
        │       └── arguments: (length: 1)
        │           └── @ SplatNode (location: (5,7)-(5,9))
        │               ├── operator_loc: (5,7)-(5,8) = "*"
        │               └── expression:
        │                   @ IntegerNode (location: (5,8)-(5,9))
        │                   ├── flags: decimal
        │                   └── value: 1
        ├── @ ReturnNode (location: (7,0)-(7,8))
        │   ├── flags: ∅
        │   ├── keyword_loc: (7,0)-(7,6) = "return"
        │   └── arguments:
        │       @ ArgumentsNode (location: (7,7)-(7,8))
        │       ├── flags: ∅
        │       └── arguments: (length: 1)
        │           └── @ IntegerNode (location: (7,7)-(7,8))
        │               ├── flags: decimal
        │               └── value: 1
        ├── @ ReturnNode (location: (9,0)-(10,1))
        │   ├── flags: ∅
        │   ├── keyword_loc: (9,0)-(9,6) = "return"
        │   └── arguments:
        │       @ ArgumentsNode (location: (9,7)-(10,1))
        │       ├── flags: ∅
        │       └── arguments: (length: 3)
        │           ├── @ IntegerNode (location: (9,7)-(9,8))
        │           │   ├── flags: decimal
        │           │   └── value: 1
        │           ├── @ IntegerNode (location: (9,10)-(9,11))
        │           │   ├── flags: decimal
        │           │   └── value: 2
        │           └── @ IntegerNode (location: (10,0)-(10,1))
        │               ├── flags: decimal
        │               └── value: 3
        ├── @ ReturnNode (location: (12,0)-(12,14))
        │   ├── flags: ∅
        │   ├── keyword_loc: (12,0)-(12,6) = "return"
        │   └── arguments:
        │       @ ArgumentsNode (location: (12,7)-(12,14))
        │       ├── flags: ∅
        │       └── arguments: (length: 3)
        │           ├── @ IntegerNode (location: (12,7)-(12,8))
        │           │   ├── flags: decimal
        │           │   └── value: 1
        │           ├── @ IntegerNode (location: (12,10)-(12,11))
        │           │   ├── flags: decimal
        │           │   └── value: 2
        │           └── @ IntegerNode (location: (12,13)-(12,14))
        │               ├── flags: decimal
        │               └── value: 3
        ├── @ ReturnNode (location: (14,0)-(14,16))
        │   ├── flags: ∅
        │   ├── keyword_loc: (14,0)-(14,6) = "return"
        │   └── arguments:
        │       @ ArgumentsNode (location: (14,7)-(14,16))
        │       ├── flags: ∅
        │       └── arguments: (length: 1)
        │           └── @ ArrayNode (location: (14,7)-(14,16))
        │               ├── flags: ∅
        │               ├── elements: (length: 3)
        │               │   ├── @ IntegerNode (location: (14,8)-(14,9))
        │               │   │   ├── flags: decimal
        │               │   │   └── value: 1
        │               │   ├── @ IntegerNode (location: (14,11)-(14,12))
        │               │   │   ├── flags: decimal
        │               │   │   └── value: 2
        │               │   └── @ IntegerNode (location: (14,14)-(14,15))
        │               │       ├── flags: decimal
        │               │       └── value: 3
        │               ├── opening_loc: (14,7)-(14,8) = "["
        │               └── closing_loc: (14,15)-(14,16) = "]"
        ├── @ ReturnNode (location: (16,0)-(19,1))
        │   ├── flags: ∅
        │   ├── keyword_loc: (16,0)-(16,6) = "return"
        │   └── arguments:
        │       @ ArgumentsNode (location: (16,6)-(19,1))
        │       ├── flags: ∅
        │       └── arguments: (length: 1)
        │           └── @ ParenthesesNode (location: (16,6)-(19,1))
        │               ├── body:
        │               │   @ StatementsNode (location: (17,2)-(18,3))
        │               │   └── body: (length: 2)
        │               │       ├── @ IntegerNode (location: (17,2)-(17,3))
        │               │       │   ├── flags: decimal
        │               │       │   └── value: 1
        │               │       └── @ IntegerNode (location: (18,2)-(18,3))
        │               │           ├── flags: decimal
        │               │           └── value: 2
        │               ├── opening_loc: (16,6)-(16,7) = "("
        │               └── closing_loc: (19,0)-(19,1) = ")"
        ├── @ ReturnNode (location: (21,0)-(21,8))
        │   ├── flags: ∅
        │   ├── keyword_loc: (21,0)-(21,6) = "return"
        │   └── arguments:
        │       @ ArgumentsNode (location: (21,6)-(21,8))
        │       ├── flags: ∅
        │       └── arguments: (length: 1)
        │           └── @ ParenthesesNode (location: (21,6)-(21,8))
        │               ├── body: ∅
        │               ├── opening_loc: (21,6)-(21,7) = "("
        │               └── closing_loc: (21,7)-(21,8) = ")"
        └── @ ReturnNode (location: (23,0)-(23,9))
            ├── flags: ∅
            ├── keyword_loc: (23,0)-(23,6) = "return"
            └── arguments:
                @ ArgumentsNode (location: (23,6)-(23,9))
                ├── flags: ∅
                └── arguments: (length: 1)
                    └── @ ParenthesesNode (location: (23,6)-(23,9))
                        ├── body:
                        │   @ StatementsNode (location: (23,7)-(23,8))
                        │   └── body: (length: 1)
                        │       └── @ IntegerNode (location: (23,7)-(23,8))
                        │           ├── flags: decimal
                        │           └── value: 1
                        ├── opening_loc: (23,6)-(23,7) = "("
                        └── closing_loc: (23,8)-(23,9) = ")"