@ ProgramNode (location: (0...27))
├── locals: [:a, :b]
└── statements:
    @ StatementsNode (location: (0...27))
    └── body: (length: 1)
        └── @ CaseNode (location: (0...27))
            ├── predicate:
            │   @ SymbolNode (location: (5...7))
            │   ├── opening_loc: (5...6) = ":"
            │   ├── value_loc: (6...7) = "a"
            │   ├── closing_loc: ∅
            │   └── unescaped: "a"
            ├── conditions: (length: 1)
            │   └── @ InNode (location: (10...23))
            │       ├── pattern:
            │       │   @ FindPatternNode (location: (13...23))
            │       │   ├── constant: ∅
            │       │   ├── left:
            │       │   │   @ SplatNode (location: (13...15))
            │       │   │   ├── operator_loc: (13...14) = "*"
            │       │   │   └── expression:
            │       │   │       @ LocalVariableTargetNode (location: (14...15))
            │       │   │       ├── name: :a
            │       │   │       └── depth: 0
            │       │   ├── requireds: (length: 1)
            │       │   │   └── @ SymbolNode (location: (17...19))
            │       │   │       ├── opening_loc: (17...18) = ":"
            │       │   │       ├── value_loc: (18...19) = "+"
            │       │   │       ├── closing_loc: ∅
            │       │   │       └── unescaped: "+"
            │       │   ├── right:
            │       │   │   @ SplatNode (location: (21...23))
            │       │   │   ├── operator_loc: (21...22) = "*"
            │       │   │   └── expression:
            │       │   │       @ LocalVariableTargetNode (location: (22...23))
            │       │   │       ├── name: :b
            │       │   │       └── depth: 0
            │       │   ├── opening_loc: ∅
            │       │   └── closing_loc: ∅
            │       ├── statements: ∅
            │       ├── in_loc: (10...12) = "in"
            │       └── then_loc: ∅
            ├── consequent: ∅
            ├── case_keyword_loc: (0...4) = "case"
            └── end_keyword_loc: (24...27) = "end"
