@ ProgramNode (location: (0...76))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...76))
    └── body: (length: 1)
        └── @ CallNode (location: (0...76))
            ├── receiver: ∅
            ├── call_operator_loc: ∅
            ├── message_loc: (0...1) = "a"
            ├── opening_loc: ∅
            ├── arguments: ∅
            ├── closing_loc: ∅
            ├── block:
            │   @ BlockNode (location: (2...76))
            │   ├── locals: [:v]
            │   ├── parameters: ∅
            │   ├── body:
            │   │   @ StatementsNode (location: (7...72))
            │   │   └── body: (length: 2)
            │   │       ├── @ LocalVariableWriteNode (location: (7...14))
            │   │       │   ├── name: :v
            │   │       │   ├── depth: 0
            │   │       │   ├── name_loc: (7...8) = "v"
            │   │       │   ├── value:
            │   │       │   │   @ NilNode (location: (11...14))
            │   │       │   └── operator_loc: (9...10) = "="
            │   │       └── @ BeginNode (location: (17...72))
            │   │           ├── begin_keyword_loc: (17...22) = "begin"
            │   │           ├── statements:
            │   │           │   @ StatementsNode (location: (27...32))
            │   │           │   └── body: (length: 1)
            │   │           │       └── @ YieldNode (location: (27...32))
            │   │           │           ├── keyword_loc: (27...32) = "yield"
            │   │           │           ├── lparen_loc: ∅
            │   │           │           ├── arguments: ∅
            │   │           │           └── rparen_loc: ∅
            │   │           ├── rescue_clause:
            │   │           │   @ RescueNode (location: (35...66))
            │   │           │   ├── keyword_loc: (35...41) = "rescue"
            │   │           │   ├── exceptions: (length: 1)
            │   │           │   │   └── @ ConstantReadNode (location: (42...51))
            │   │           │   │       └── name: :Exception
            │   │           │   ├── operator_loc: (52...54) = "=>"
            │   │           │   ├── reference:
            │   │           │   │   @ LocalVariableTargetNode (location: (55...56))
            │   │           │   │   ├── name: :v
            │   │           │   │   └── depth: 0
            │   │           │   ├── statements:
            │   │           │   │   @ StatementsNode (location: (61...66))
            │   │           │   │   └── body: (length: 1)
            │   │           │   │       └── @ BreakNode (location: (61...66))
            │   │           │   │           ├── arguments: ∅
            │   │           │   │           └── keyword_loc: (61...66) = "break"
            │   │           │   └── consequent: ∅
            │   │           ├── else_clause: ∅
            │   │           ├── ensure_clause: ∅
            │   │           └── end_keyword_loc: (69...72) = "end"
            │   ├── opening_loc: (2...4) = "do"
            │   └── closing_loc: (73...76) = "end"
            ├── flags: ∅
            └── name: "a"
