@ ProgramNode (location: (0...109))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...109))
    └── body: (length: 6)
        ├── @ UntilNode (location: (0...18))
        │   ├── keyword_loc: (0...5) = "until"
        │   ├── closing_loc: (15...18) = "end"
        │   ├── predicate:
        │   │   @ TrueNode (location: (6...10))
        │   ├── statements:
        │   │   @ StatementsNode (location: (12...13))
        │   │   └── body: (length: 1)
        │   │       └── @ IntegerNode (location: (12...13))
        │   │           └── flags: decimal
        │   └── flags: ∅
        ├── @ UntilNode (location: (20...32))
        │   ├── keyword_loc: (22...27) = "until"
        │   ├── closing_loc: ∅
        │   ├── predicate:
        │   │   @ TrueNode (location: (28...32))
        │   ├── statements:
        │   │   @ StatementsNode (location: (20...21))
        │   │   └── body: (length: 1)
        │   │       └── @ IntegerNode (location: (20...21))
        │   │           └── flags: decimal
        │   └── flags: ∅
        ├── @ UntilNode (location: (34...50))
        │   ├── keyword_loc: (40...45) = "until"
        │   ├── closing_loc: ∅
        │   ├── predicate:
        │   │   @ TrueNode (location: (46...50))
        │   ├── statements:
        │   │   @ StatementsNode (location: (34...39))
        │   │   └── body: (length: 1)
        │   │       └── @ BreakNode (location: (34...39))
        │   │           ├── arguments: ∅
        │   │           └── keyword_loc: (34...39) = "break"
        │   └── flags: ∅
        ├── @ UntilNode (location: (52...67))
        │   ├── keyword_loc: (57...62) = "until"
        │   ├── closing_loc: ∅
        │   ├── predicate:
        │   │   @ TrueNode (location: (63...67))
        │   ├── statements:
        │   │   @ StatementsNode (location: (52...56))
        │   │   └── body: (length: 1)
        │   │       └── @ NextNode (location: (52...56))
        │   │           ├── arguments: ∅
        │   │           └── keyword_loc: (52...56) = "next"
        │   └── flags: ∅
        ├── @ UntilNode (location: (69...86))
        │   ├── keyword_loc: (76...81) = "until"
        │   ├── closing_loc: ∅
        │   ├── predicate:
        │   │   @ TrueNode (location: (82...86))
        │   ├── statements:
        │   │   @ StatementsNode (location: (69...75))
        │   │   └── body: (length: 1)
        │   │       └── @ ReturnNode (location: (69...75))
        │   │           ├── keyword_loc: (69...75) = "return"
        │   │           └── arguments: ∅
        │   └── flags: ∅
        └── @ UntilNode (location: (88...109))
            ├── keyword_loc: (99...104) = "until"
            ├── closing_loc: ∅
            ├── predicate:
            │   @ CallNode (location: (105...109))
            │   ├── receiver: ∅
            │   ├── call_operator_loc: ∅
            │   ├── message_loc: (105...109) = "bar?"
            │   ├── opening_loc: ∅
            │   ├── arguments: ∅
            │   ├── closing_loc: ∅
            │   ├── block: ∅
            │   ├── flags: ∅
            │   └── name: "bar?"
            ├── statements:
            │   @ StatementsNode (location: (88...98))
            │   └── body: (length: 1)
            │       └── @ CallNode (location: (88...98))
            │           ├── receiver: ∅
            │           ├── call_operator_loc: ∅
            │           ├── message_loc: (88...91) = "foo"
            │           ├── opening_loc: ∅
            │           ├── arguments:
            │           │   @ ArgumentsNode (location: (92...98))
            │           │   └── arguments: (length: 2)
            │           │       ├── @ SymbolNode (location: (92...94))
            │           │       │   ├── opening_loc: (92...93) = ":"
            │           │       │   ├── value_loc: (93...94) = "a"
            │           │       │   ├── closing_loc: ∅
            │           │       │   └── unescaped: "a"
            │           │       └── @ SymbolNode (location: (96...98))
            │           │           ├── opening_loc: (96...97) = ":"
            │           │           ├── value_loc: (97...98) = "b"
            │           │           ├── closing_loc: ∅
            │           │           └── unescaped: "b"
            │           ├── closing_loc: ∅
            │           ├── block: ∅
            │           ├── flags: ∅
            │           └── name: "foo"
            └── flags: ∅