@ ProgramNode (location: (1,0)-(19,8))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(19,8))
    └── body: (length: 10)
        ├── @ ParenthesesNode (location: (1,0)-(1,6))
        │   ├── body:
        │   │   @ StatementsNode (location: (1,1)-(1,5))
        │   │   └── body: (length: 1)
        │   │       └── @ RangeNode (location: (1,1)-(1,5))
        │   │           ├── left: ∅
        │   │           ├── right:
        │   │           │   @ IntegerNode (location: (1,4)-(1,5))
        │   │           │   └── flags: decimal
        │   │           ├── operator_loc: (1,1)-(1,4) = "..."
        │   │           └── flags: exclude_end
        │   ├── opening_loc: (1,0)-(1,1) = "("
        │   └── closing_loc: (1,5)-(1,6) = ")"
        ├── @ ParenthesesNode (location: (3,0)-(3,5))
        │   ├── body:
        │   │   @ StatementsNode (location: (3,1)-(3,4))
        │   │   └── body: (length: 1)
        │   │       └── @ RangeNode (location: (3,1)-(3,4))
        │   │           ├── left: ∅
        │   │           ├── right:
        │   │           │   @ IntegerNode (location: (3,3)-(3,4))
        │   │           │   └── flags: decimal
        │   │           ├── operator_loc: (3,1)-(3,3) = ".."
        │   │           └── flags: ∅
        │   ├── opening_loc: (3,0)-(3,1) = "("
        │   └── closing_loc: (3,4)-(3,5) = ")"
        ├── @ RangeNode (location: (5,0)-(5,5))
        │   ├── left:
        │   │   @ IntegerNode (location: (5,0)-(5,1))
        │   │   └── flags: decimal
        │   ├── right:
        │   │   @ IntegerNode (location: (5,4)-(5,5))
        │   │   └── flags: decimal
        │   ├── operator_loc: (5,1)-(5,4) = "..."
        │   └── flags: exclude_end
        ├── @ CallNode (location: (7,0)-(7,9))
        │   ├── receiver:
        │   │   @ CallNode (location: (7,0)-(7,3))
        │   │   ├── receiver: ∅
        │   │   ├── call_operator_loc: ∅
        │   │   ├── name: :foo
        │   │   ├── message_loc: (7,0)-(7,3) = "foo"
        │   │   ├── opening_loc: ∅
        │   │   ├── arguments: ∅
        │   │   ├── closing_loc: ∅
        │   │   ├── block: ∅
        │   │   └── flags: variable_call
        │   ├── call_operator_loc: ∅
        │   ├── name: :[]
        │   ├── message_loc: (7,3)-(7,9) = "[...2]"
        │   ├── opening_loc: (7,3)-(7,4) = "["
        │   ├── arguments:
        │   │   @ ArgumentsNode (location: (7,4)-(7,8))
        │   │   ├── arguments: (length: 1)
        │   │   │   └── @ RangeNode (location: (7,4)-(7,8))
        │   │   │       ├── left: ∅
        │   │   │       ├── right:
        │   │   │       │   @ IntegerNode (location: (7,7)-(7,8))
        │   │   │       │   └── flags: decimal
        │   │   │       ├── operator_loc: (7,4)-(7,7) = "..."
        │   │   │       └── flags: exclude_end
        │   │   └── flags: ∅
        │   ├── closing_loc: (7,8)-(7,9) = "]"
        │   ├── block: ∅
        │   └── flags: ∅
        ├── @ HashNode (location: (9,0)-(9,15))
        │   ├── opening_loc: (9,0)-(9,1) = "{"
        │   ├── elements: (length: 1)
        │   │   └── @ AssocNode (location: (9,2)-(9,13))
        │   │       ├── key:
        │   │       │   @ SymbolNode (location: (9,2)-(9,6))
        │   │       │   ├── opening_loc: ∅
        │   │       │   ├── value_loc: (9,2)-(9,5) = "foo"
        │   │       │   ├── closing_loc: (9,5)-(9,6) = ":"
        │   │       │   └── unescaped: "foo"
        │   │       ├── value:
        │   │       │   @ RangeNode (location: (9,7)-(9,13))
        │   │       │   ├── left: ∅
        │   │       │   ├── right:
        │   │       │   │   @ CallNode (location: (9,10)-(9,13))
        │   │       │   │   ├── receiver: ∅
        │   │       │   │   ├── call_operator_loc: ∅
        │   │       │   │   ├── name: :bar
        │   │       │   │   ├── message_loc: (9,10)-(9,13) = "bar"
        │   │       │   │   ├── opening_loc: ∅
        │   │       │   │   ├── arguments: ∅
        │   │       │   │   ├── closing_loc: ∅
        │   │       │   │   ├── block: ∅
        │   │       │   │   └── flags: variable_call
        │   │       │   ├── operator_loc: (9,7)-(9,10) = "..."
        │   │       │   └── flags: exclude_end
        │   │       └── operator_loc: ∅
        │   └── closing_loc: (9,14)-(9,15) = "}"
        ├── @ ParenthesesNode (location: (11,0)-(11,6))
        │   ├── body:
        │   │   @ StatementsNode (location: (11,1)-(11,5))
        │   │   └── body: (length: 1)
        │   │       └── @ RangeNode (location: (11,1)-(11,5))
        │   │           ├── left:
        │   │           │   @ IntegerNode (location: (11,1)-(11,2))
        │   │           │   └── flags: decimal
        │   │           ├── right: ∅
        │   │           ├── operator_loc: (11,2)-(11,5) = "..."
        │   │           └── flags: exclude_end
        │   ├── opening_loc: (11,0)-(11,1) = "("
        │   └── closing_loc: (11,5)-(11,6) = ")"
        ├── @ RangeNode (location: (13,0)-(13,4))
        │   ├── left:
        │   │   @ IntegerNode (location: (13,0)-(13,1))
        │   │   └── flags: decimal
        │   ├── right:
        │   │   @ IntegerNode (location: (13,3)-(13,4))
        │   │   └── flags: decimal
        │   ├── operator_loc: (13,1)-(13,3) = ".."
        │   └── flags: ∅
        ├── @ HashNode (location: (15,0)-(15,14))
        │   ├── opening_loc: (15,0)-(15,1) = "{"
        │   ├── elements: (length: 1)
        │   │   └── @ AssocNode (location: (15,2)-(15,12))
        │   │       ├── key:
        │   │       │   @ SymbolNode (location: (15,2)-(15,6))
        │   │       │   ├── opening_loc: ∅
        │   │       │   ├── value_loc: (15,2)-(15,5) = "foo"
        │   │       │   ├── closing_loc: (15,5)-(15,6) = ":"
        │   │       │   └── unescaped: "foo"
        │   │       ├── value:
        │   │       │   @ RangeNode (location: (15,7)-(15,12))
        │   │       │   ├── left: ∅
        │   │       │   ├── right:
        │   │       │   │   @ CallNode (location: (15,9)-(15,12))
        │   │       │   │   ├── receiver: ∅
        │   │       │   │   ├── call_operator_loc: ∅
        │   │       │   │   ├── name: :bar
        │   │       │   │   ├── message_loc: (15,9)-(15,12) = "bar"
        │   │       │   │   ├── opening_loc: ∅
        │   │       │   │   ├── arguments: ∅
        │   │       │   │   ├── closing_loc: ∅
        │   │       │   │   ├── block: ∅
        │   │       │   │   └── flags: variable_call
        │   │       │   ├── operator_loc: (15,7)-(15,9) = ".."
        │   │       │   └── flags: ∅
        │   │       └── operator_loc: ∅
        │   └── closing_loc: (15,13)-(15,14) = "}"
        ├── @ ParenthesesNode (location: (17,0)-(17,5))
        │   ├── body:
        │   │   @ StatementsNode (location: (17,1)-(17,4))
        │   │   └── body: (length: 1)
        │   │       └── @ RangeNode (location: (17,1)-(17,4))
        │   │           ├── left:
        │   │           │   @ IntegerNode (location: (17,1)-(17,2))
        │   │           │   └── flags: decimal
        │   │           ├── right: ∅
        │   │           ├── operator_loc: (17,2)-(17,4) = ".."
        │   │           └── flags: ∅
        │   ├── opening_loc: (17,0)-(17,1) = "("
        │   └── closing_loc: (17,4)-(17,5) = ")"
        └── @ RangeNode (location: (19,0)-(19,8))
            ├── left:
            │   @ IntegerNode (location: (19,0)-(19,1))
            │   └── flags: decimal
            ├── right:
            │   @ RangeNode (location: (19,5)-(19,8))
            │   ├── left: ∅
            │   ├── right:
            │   │   @ IntegerNode (location: (19,7)-(19,8))
            │   │   └── flags: decimal
            │   ├── operator_loc: (19,5)-(19,7) = ".."
            │   └── flags: ∅
            ├── operator_loc: (19,2)-(19,4) = ".."
            └── flags: ∅