@ ProgramNode (location: (1,0)-(4,3))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(4,3))
    └── body: (length: 1)
        └── @ CaseMatchNode (location: (1,0)-(4,3))
            ├── predicate:
            │   @ ArrayNode (location: (1,5)-(1,14))
            │   ├── flags: ∅
            │   ├── elements: (length: 3)
            │   │   ├── @ IntegerNode (location: (1,6)-(1,7))
            │   │   │   ├── flags: decimal
            │   │   │   └── value: 0
            │   │   ├── @ IntegerNode (location: (1,9)-(1,10))
            │   │   │   ├── flags: decimal
            │   │   │   └── value: 1
            │   │   └── @ IntegerNode (location: (1,12)-(1,13))
            │   │       ├── flags: decimal
            │   │       └── value: 2
            │   ├── opening_loc: (1,5)-(1,6) = "["
            │   └── closing_loc: (1,13)-(1,14) = "]"
            ├── conditions: (length: 1)
            │   └── @ InNode (location: (2,0)-(3,6))
            │       ├── pattern:
            │       │   @ ArrayPatternNode (location: (2,3)-(2,10))
            │       │   ├── constant: ∅
            │       │   ├── requireds: (length: 2)
            │       │   │   ├── @ IntegerNode (location: (2,4)-(2,5))
            │       │   │   │   ├── flags: decimal
            │       │   │   │   └── value: 0
            │       │   │   └── @ IntegerNode (location: (2,7)-(2,8))
            │       │   │       ├── flags: decimal
            │       │   │       └── value: 1
            │       │   ├── rest:
            │       │   │   @ ImplicitRestNode (location: (2,8)-(2,9))
            │       │   ├── posts: (length: 0)
            │       │   ├── opening_loc: (2,3)-(2,4) = "["
            │       │   └── closing_loc: (2,9)-(2,10) = "]"
            │       ├── statements:
            │       │   @ StatementsNode (location: (3,2)-(3,6))
            │       │   └── body: (length: 1)
            │       │       └── @ TrueNode (location: (3,2)-(3,6))
            │       ├── in_loc: (2,0)-(2,2) = "in"
            │       └── then_loc: ∅
            ├── consequent: ∅
            ├── case_keyword_loc: (1,0)-(1,4) = "case"
            └── end_keyword_loc: (4,0)-(4,3) = "end"