@ ProgramNode (location: (1,0)-(3,3))
├── locals: [:c]
└── statements:
    @ StatementsNode (location: (1,0)-(3,3))
    └── body: (length: 1)
        └── @ CaseMatchNode (location: (1,0)-(3,3))
            ├── predicate:
            │   @ SymbolNode (location: (1,5)-(1,7))
            │   ├── flags: forced_us_ascii_encoding
            │   ├── opening_loc: (1,5)-(1,6) = ":"
            │   ├── value_loc: (1,6)-(1,7) = "a"
            │   ├── closing_loc: ∅
            │   └── unescaped: "a"
            ├── conditions: (length: 1)
            │   └── @ InNode (location: (2,0)-(2,16))
            │       ├── pattern:
            │       │   @ FindPatternNode (location: (2,3)-(2,16))
            │       │   ├── constant: ∅
            │       │   ├── left:
            │       │   │   @ SplatNode (location: (2,4)-(2,5))
            │       │   │   ├── operator_loc: (2,4)-(2,5) = "*"
            │       │   │   └── expression: ∅
            │       │   ├── requireds: (length: 2)
            │       │   │   ├── @ SymbolNode (location: (2,7)-(2,9))
            │       │   │   │   ├── flags: forced_us_ascii_encoding
            │       │   │   │   ├── opening_loc: (2,7)-(2,8) = ":"
            │       │   │   │   ├── value_loc: (2,8)-(2,9) = "b"
            │       │   │   │   ├── closing_loc: ∅
            │       │   │   │   └── unescaped: "b"
            │       │   │   └── @ LocalVariableTargetNode (location: (2,11)-(2,12))
            │       │   │       ├── name: :c
            │       │   │       └── depth: 0
            │       │   ├── right:
            │       │   │   @ SplatNode (location: (2,14)-(2,15))
            │       │   │   ├── operator_loc: (2,14)-(2,15) = "*"
            │       │   │   └── expression: ∅
            │       │   ├── opening_loc: (2,3)-(2,4) = "["
            │       │   └── closing_loc: (2,15)-(2,16) = "]"
            │       ├── statements: ∅
            │       ├── in_loc: (2,0)-(2,2) = "in"
            │       └── then_loc: ∅
            ├── consequent: ∅
            ├── case_keyword_loc: (1,0)-(1,4) = "case"
            └── end_keyword_loc: (3,0)-(3,3) = "end"