@ ProgramNode (location: (1,0)-(13,20))
├── flags: ∅
├── locals: [:baz]
└── statements:
    @ StatementsNode (location: (1,0)-(13,20))
    ├── flags: ∅
    └── body: (length: 7)
        ├── @ UntilNode (location: (1,0)-(1,18))
        │   ├── flags: newline
        │   ├── keyword_loc: (1,0)-(1,5) = "until"
        │   ├── do_keyword_loc: ∅
        │   ├── closing_loc: (1,15)-(1,18) = "end"
        │   ├── predicate:
        │   │   @ TrueNode (location: (1,6)-(1,10))
        │   │   └── flags: static_literal
        │   └── statements:
        │       @ StatementsNode (location: (1,12)-(1,13))
        │       ├── flags: ∅
        │       └── body: (length: 1)
        │           └── @ IntegerNode (location: (1,12)-(1,13))
        │               ├── flags: newline, static_literal, decimal
        │               └── value: 1
        ├── @ UntilNode (location: (3,0)-(3,12))
        │   ├── flags: newline
        │   ├── keyword_loc: (3,2)-(3,7) = "until"
        │   ├── do_keyword_loc: ∅
        │   ├── closing_loc: ∅
        │   ├── predicate:
        │   │   @ TrueNode (location: (3,8)-(3,12))
        │   │   └── flags: static_literal
        │   └── statements:
        │       @ StatementsNode (location: (3,0)-(3,1))
        │       ├── flags: ∅
        │       └── body: (length: 1)
        │           └── @ IntegerNode (location: (3,0)-(3,1))
        │               ├── flags: newline, static_literal, decimal
        │               └── value: 1
        ├── @ CallNode (location: (5,0)-(5,24))
        │   ├── flags: newline, ignore_visibility
        │   ├── receiver: ∅
        │   ├── call_operator_loc: ∅
        │   ├── name: :tap
        │   ├── message_loc: (5,0)-(5,3) = "tap"
        │   ├── opening_loc: ∅
        │   ├── arguments: ∅
        │   ├── closing_loc: ∅
        │   └── block:
        │       @ BlockNode (location: (5,4)-(5,24))
        │       ├── flags: ∅
        │       ├── locals: []
        │       ├── parameters: ∅
        │       ├── body:
        │       │   @ StatementsNode (location: (5,6)-(5,22))
        │       │   ├── flags: ∅
        │       │   └── body: (length: 1)
        │       │       └── @ UntilNode (location: (5,6)-(5,22))
        │       │           ├── flags: newline
        │       │           ├── keyword_loc: (5,12)-(5,17) = "until"
        │       │           ├── do_keyword_loc: ∅
        │       │           ├── closing_loc: ∅
        │       │           ├── predicate:
        │       │           │   @ TrueNode (location: (5,18)-(5,22))
        │       │           │   └── flags: static_literal
        │       │           └── statements:
        │       │               @ StatementsNode (location: (5,6)-(5,11))
        │       │               ├── flags: ∅
        │       │               └── body: (length: 1)
        │       │                   └── @ BreakNode (location: (5,6)-(5,11))
        │       │                       ├── flags: newline
        │       │                       ├── arguments: ∅
        │       │                       └── keyword_loc: (5,6)-(5,11) = "break"
        │       ├── opening_loc: (5,4)-(5,5) = "{"
        │       └── closing_loc: (5,23)-(5,24) = "}"
        ├── @ CallNode (location: (7,0)-(7,23))
        │   ├── flags: newline, ignore_visibility
        │   ├── receiver: ∅
        │   ├── call_operator_loc: ∅
        │   ├── name: :tap
        │   ├── message_loc: (7,0)-(7,3) = "tap"
        │   ├── opening_loc: ∅
        │   ├── arguments: ∅
        │   ├── closing_loc: ∅
        │   └── block:
        │       @ BlockNode (location: (7,4)-(7,23))
        │       ├── flags: ∅
        │       ├── locals: []
        │       ├── parameters: ∅
        │       ├── body:
        │       │   @ StatementsNode (location: (7,6)-(7,21))
        │       │   ├── flags: ∅
        │       │   └── body: (length: 1)
        │       │       └── @ UntilNode (location: (7,6)-(7,21))
        │       │           ├── flags: newline
        │       │           ├── keyword_loc: (7,11)-(7,16) = "until"
        │       │           ├── do_keyword_loc: ∅
        │       │           ├── closing_loc: ∅
        │       │           ├── predicate:
        │       │           │   @ TrueNode (location: (7,17)-(7,21))
        │       │           │   └── flags: static_literal
        │       │           └── statements:
        │       │               @ StatementsNode (location: (7,6)-(7,10))
        │       │               ├── flags: ∅
        │       │               └── body: (length: 1)
        │       │                   └── @ NextNode (location: (7,6)-(7,10))
        │       │                       ├── flags: newline
        │       │                       ├── arguments: ∅
        │       │                       └── keyword_loc: (7,6)-(7,10) = "next"
        │       ├── opening_loc: (7,4)-(7,5) = "{"
        │       └── closing_loc: (7,22)-(7,23) = "}"
        ├── @ UntilNode (location: (9,0)-(9,17))
        │   ├── flags: newline
        │   ├── keyword_loc: (9,7)-(9,12) = "until"
        │   ├── do_keyword_loc: ∅
        │   ├── closing_loc: ∅
        │   ├── predicate:
        │   │   @ TrueNode (location: (9,13)-(9,17))
        │   │   └── flags: static_literal
        │   └── statements:
        │       @ StatementsNode (location: (9,0)-(9,6))
        │       ├── flags: ∅
        │       └── body: (length: 1)
        │           └── @ ReturnNode (location: (9,0)-(9,6))
        │               ├── flags: newline
        │               ├── keyword_loc: (9,0)-(9,6) = "return"
        │               └── arguments: ∅
        ├── @ UntilNode (location: (11,0)-(11,21))
        │   ├── flags: newline
        │   ├── keyword_loc: (11,11)-(11,16) = "until"
        │   ├── do_keyword_loc: ∅
        │   ├── closing_loc: ∅
        │   ├── predicate:
        │   │   @ CallNode (location: (11,17)-(11,21))
        │   │   ├── flags: ignore_visibility
        │   │   ├── receiver: ∅
        │   │   ├── call_operator_loc: ∅
        │   │   ├── name: :bar?
        │   │   ├── message_loc: (11,17)-(11,21) = "bar?"
        │   │   ├── opening_loc: ∅
        │   │   ├── arguments: ∅
        │   │   ├── closing_loc: ∅
        │   │   └── block: ∅
        │   └── statements:
        │       @ StatementsNode (location: (11,0)-(11,10))
        │       ├── flags: ∅
        │       └── body: (length: 1)
        │           └── @ CallNode (location: (11,0)-(11,10))
        │               ├── flags: newline, ignore_visibility
        │               ├── receiver: ∅
        │               ├── call_operator_loc: ∅
        │               ├── name: :foo
        │               ├── message_loc: (11,0)-(11,3) = "foo"
        │               ├── opening_loc: ∅
        │               ├── arguments:
        │               │   @ ArgumentsNode (location: (11,4)-(11,10))
        │               │   ├── flags: ∅
        │               │   └── arguments: (length: 2)
        │               │       ├── @ SymbolNode (location: (11,4)-(11,6))
        │               │       │   ├── flags: static_literal, forced_us_ascii_encoding
        │               │       │   ├── opening_loc: (11,4)-(11,5) = ":"
        │               │       │   ├── value_loc: (11,5)-(11,6) = "a"
        │               │       │   ├── closing_loc: ∅
        │               │       │   └── unescaped: "a"
        │               │       └── @ SymbolNode (location: (11,8)-(11,10))
        │               │           ├── flags: static_literal, forced_us_ascii_encoding
        │               │           ├── opening_loc: (11,8)-(11,9) = ":"
        │               │           ├── value_loc: (11,9)-(11,10) = "b"
        │               │           ├── closing_loc: ∅
        │               │           └── unescaped: "b"
        │               ├── closing_loc: ∅
        │               └── block: ∅
        └── @ WhileNode (location: (13,0)-(13,20))
            ├── flags: newline
            ├── keyword_loc: (13,4)-(13,9) = "while"
            ├── do_keyword_loc: ∅
            ├── closing_loc: ∅
            ├── predicate:
            │   @ MatchPredicateNode (location: (13,10)-(13,20))
            │   ├── flags: ∅
            │   ├── value:
            │   │   @ CallNode (location: (13,10)-(13,13))
            │   │   ├── flags: variable_call, ignore_visibility
            │   │   ├── receiver: ∅
            │   │   ├── call_operator_loc: ∅
            │   │   ├── name: :bar
            │   │   ├── message_loc: (13,10)-(13,13) = "bar"
            │   │   ├── opening_loc: ∅
            │   │   ├── arguments: ∅
            │   │   ├── closing_loc: ∅
            │   │   └── block: ∅
            │   ├── pattern:
            │   │   @ LocalVariableTargetNode (location: (13,17)-(13,20))
            │   │   ├── flags: ∅
            │   │   ├── name: :baz
            │   │   └── depth: 0
            │   └── operator_loc: (13,14)-(13,16) = "in"
            └── statements:
                @ StatementsNode (location: (13,0)-(13,3))
                ├── flags: ∅
                └── body: (length: 1)
                    └── @ CallNode (location: (13,0)-(13,3))
                        ├── flags: newline, variable_call, ignore_visibility
                        ├── receiver: ∅
                        ├── call_operator_loc: ∅
                        ├── name: :foo
                        ├── message_loc: (13,0)-(13,3) = "foo"
                        ├── opening_loc: ∅
                        ├── arguments: ∅
                        ├── closing_loc: ∅
                        └── block: ∅
