@ ProgramNode (location: (1,0)-(5,31))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(5,31))
    └── body: (length: 3)
        ├── @ IfNode (location: (1,0)-(1,33))
        │   ├── if_keyword_loc: ∅
        │   ├── predicate:
        │   │   @ FalseNode (location: (1,0)-(1,5))
        │   ├── then_keyword_loc: (1,6)-(1,7) = "?"
        │   ├── statements:
        │   │   @ StatementsNode (location: (1,8)-(1,20))
        │   │   └── body: (length: 1)
        │   │       └── @ CallNode (location: (1,8)-(1,20))
        │   │           ├── flags: ignore_visibility
        │   │           ├── receiver: ∅
        │   │           ├── call_operator_loc: ∅
        │   │           ├── name: :raise
        │   │           ├── message_loc: (1,8)-(1,13) = "raise"
        │   │           ├── opening_loc: ∅
        │   │           ├── arguments: ∅
        │   │           ├── closing_loc: ∅
        │   │           └── block:
        │   │               @ BlockNode (location: (1,14)-(1,20))
        │   │               ├── locals: []
        │   │               ├── parameters: ∅
        │   │               ├── body: ∅
        │   │               ├── opening_loc: (1,14)-(1,16) = "do"
        │   │               └── closing_loc: (1,17)-(1,20) = "end"
        │   ├── consequent:
        │   │   @ ElseNode (location: (1,21)-(1,33))
        │   │   ├── else_keyword_loc: (1,21)-(1,22) = ":"
        │   │   ├── statements:
        │   │   │   @ StatementsNode (location: (1,23)-(1,33))
        │   │   │   └── body: (length: 1)
        │   │   │       └── @ CallNode (location: (1,23)-(1,33))
        │   │   │           ├── flags: ignore_visibility
        │   │   │           ├── receiver: ∅
        │   │   │           ├── call_operator_loc: ∅
        │   │   │           ├── name: :tap
        │   │   │           ├── message_loc: (1,23)-(1,26) = "tap"
        │   │   │           ├── opening_loc: ∅
        │   │   │           ├── arguments: ∅
        │   │   │           ├── closing_loc: ∅
        │   │   │           └── block:
        │   │   │               @ BlockNode (location: (1,27)-(1,33))
        │   │   │               ├── locals: []
        │   │   │               ├── parameters: ∅
        │   │   │               ├── body: ∅
        │   │   │               ├── opening_loc: (1,27)-(1,29) = "do"
        │   │   │               └── closing_loc: (1,30)-(1,33) = "end"
        │   │   └── end_keyword_loc: ∅
        │   └── end_keyword_loc: ∅
        ├── @ IfNode (location: (3,0)-(3,25))
        │   ├── if_keyword_loc: ∅
        │   ├── predicate:
        │   │   @ FalseNode (location: (3,0)-(3,5))
        │   ├── then_keyword_loc: (3,6)-(3,7) = "?"
        │   ├── statements:
        │   │   @ StatementsNode (location: (3,8)-(3,16))
        │   │   └── body: (length: 1)
        │   │       └── @ CallNode (location: (3,8)-(3,16))
        │   │           ├── flags: ignore_visibility
        │   │           ├── receiver: ∅
        │   │           ├── call_operator_loc: ∅
        │   │           ├── name: :raise
        │   │           ├── message_loc: (3,8)-(3,13) = "raise"
        │   │           ├── opening_loc: ∅
        │   │           ├── arguments: ∅
        │   │           ├── closing_loc: ∅
        │   │           └── block:
        │   │               @ BlockNode (location: (3,14)-(3,16))
        │   │               ├── locals: []
        │   │               ├── parameters: ∅
        │   │               ├── body: ∅
        │   │               ├── opening_loc: (3,14)-(3,15) = "{"
        │   │               └── closing_loc: (3,15)-(3,16) = "}"
        │   ├── consequent:
        │   │   @ ElseNode (location: (3,17)-(3,25))
        │   │   ├── else_keyword_loc: (3,17)-(3,18) = ":"
        │   │   ├── statements:
        │   │   │   @ StatementsNode (location: (3,19)-(3,25))
        │   │   │   └── body: (length: 1)
        │   │   │       └── @ CallNode (location: (3,19)-(3,25))
        │   │   │           ├── flags: ignore_visibility
        │   │   │           ├── receiver: ∅
        │   │   │           ├── call_operator_loc: ∅
        │   │   │           ├── name: :tap
        │   │   │           ├── message_loc: (3,19)-(3,22) = "tap"
        │   │   │           ├── opening_loc: ∅
        │   │   │           ├── arguments: ∅
        │   │   │           ├── closing_loc: ∅
        │   │   │           └── block:
        │   │   │               @ BlockNode (location: (3,23)-(3,25))
        │   │   │               ├── locals: []
        │   │   │               ├── parameters: ∅
        │   │   │               ├── body: ∅
        │   │   │               ├── opening_loc: (3,23)-(3,24) = "{"
        │   │   │               └── closing_loc: (3,24)-(3,25) = "}"
        │   │   └── end_keyword_loc: ∅
        │   └── end_keyword_loc: ∅
        └── @ IfNode (location: (5,0)-(5,31))
            ├── if_keyword_loc: ∅
            ├── predicate:
            │   @ TrueNode (location: (5,0)-(5,4))
            ├── then_keyword_loc: (5,5)-(5,6) = "?"
            ├── statements:
            │   @ StatementsNode (location: (5,7)-(5,27))
            │   └── body: (length: 1)
            │       └── @ CallNode (location: (5,7)-(5,27))
            │           ├── flags: ∅
            │           ├── receiver:
            │           │   @ IntegerNode (location: (5,7)-(5,8))
            │           │   ├── flags: decimal
            │           │   └── value: 1
            │           ├── call_operator_loc: (5,8)-(5,9) = "."
            │           ├── name: :tap
            │           ├── message_loc: (5,9)-(5,12) = "tap"
            │           ├── opening_loc: ∅
            │           ├── arguments: ∅
            │           ├── closing_loc: ∅
            │           └── block:
            │               @ BlockNode (location: (5,13)-(5,27))
            │               ├── locals: [:n]
            │               ├── parameters:
            │               │   @ BlockParametersNode (location: (5,16)-(5,19))
            │               │   ├── parameters:
            │               │   │   @ ParametersNode (location: (5,17)-(5,18))
            │               │   │   ├── requireds: (length: 1)
            │               │   │   │   └── @ RequiredParameterNode (location: (5,17)-(5,18))
            │               │   │   │       ├── flags: ∅
            │               │   │   │       └── name: :n
            │               │   │   ├── optionals: (length: 0)
            │               │   │   ├── rest: ∅
            │               │   │   ├── posts: (length: 0)
            │               │   │   ├── keywords: (length: 0)
            │               │   │   ├── keyword_rest: ∅
            │               │   │   └── block: ∅
            │               │   ├── locals: (length: 0)
            │               │   ├── opening_loc: (5,16)-(5,17) = "|"
            │               │   └── closing_loc: (5,18)-(5,19) = "|"
            │               ├── body:
            │               │   @ StatementsNode (location: (5,20)-(5,23))
            │               │   └── body: (length: 1)
            │               │       └── @ CallNode (location: (5,20)-(5,23))
            │               │           ├── flags: ignore_visibility
            │               │           ├── receiver: ∅
            │               │           ├── call_operator_loc: ∅
            │               │           ├── name: :p
            │               │           ├── message_loc: (5,20)-(5,21) = "p"
            │               │           ├── opening_loc: ∅
            │               │           ├── arguments:
            │               │           │   @ ArgumentsNode (location: (5,22)-(5,23))
            │               │           │   ├── flags: ∅
            │               │           │   └── arguments: (length: 1)
            │               │           │       └── @ LocalVariableReadNode (location: (5,22)-(5,23))
            │               │           │           ├── name: :n
            │               │           │           └── depth: 0
            │               │           ├── closing_loc: ∅
            │               │           └── block: ∅
            │               ├── opening_loc: (5,13)-(5,15) = "do"
            │               └── closing_loc: (5,24)-(5,27) = "end"
            ├── consequent:
            │   @ ElseNode (location: (5,28)-(5,31))
            │   ├── else_keyword_loc: (5,28)-(5,29) = ":"
            │   ├── statements:
            │   │   @ StatementsNode (location: (5,30)-(5,31))
            │   │   └── body: (length: 1)
            │   │       └── @ IntegerNode (location: (5,30)-(5,31))
            │   │           ├── flags: decimal
            │   │           └── value: 0
            │   └── end_keyword_loc: ∅
            └── end_keyword_loc: ∅