@ ProgramNode (location: (1,0)-(4,17))
├── locals: [:a, :foo]
└── statements:
    @ StatementsNode (location: (1,0)-(4,17))
    └── body: (length: 4)
        ├── @ MatchRequiredNode (location: (1,0)-(1,8))
        │   ├── value:
        │   │   @ IntegerNode (location: (1,0)-(1,1))
        │   │   ├── flags: decimal
        │   │   └── value: 1
        │   ├── pattern:
        │   │   @ ArrayPatternNode (location: (1,5)-(1,8))
        │   │   ├── constant: ∅
        │   │   ├── requireds: (length: 1)
        │   │   │   └── @ LocalVariableTargetNode (location: (1,6)-(1,7))
        │   │   │       ├── name: :a
        │   │   │       └── depth: 0
        │   │   ├── rest: ∅
        │   │   ├── posts: (length: 0)
        │   │   ├── opening_loc: (1,5)-(1,6) = "["
        │   │   └── closing_loc: (1,7)-(1,8) = "]"
        │   └── operator_loc: (1,2)-(1,4) = "=>"
        ├── @ MatchRequiredNode (location: (2,0)-(2,8))
        │   ├── value:
        │   │   @ IntegerNode (location: (2,0)-(2,1))
        │   │   ├── flags: decimal
        │   │   └── value: 1
        │   ├── pattern:
        │   │   @ ArrayPatternNode (location: (2,5)-(2,8))
        │   │   ├── constant: ∅
        │   │   ├── requireds: (length: 0)
        │   │   ├── rest:
        │   │   │   @ SplatNode (location: (2,6)-(2,7))
        │   │   │   ├── operator_loc: (2,6)-(2,7) = "*"
        │   │   │   └── expression: ∅
        │   │   ├── posts: (length: 0)
        │   │   ├── opening_loc: (2,5)-(2,6) = "["
        │   │   └── closing_loc: (2,7)-(2,8) = "]"
        │   └── operator_loc: (2,2)-(2,4) = "=>"
        ├── @ MatchPredicateNode (location: (3,0)-(3,15))
        │   ├── value:
        │   │   @ IntegerNode (location: (3,0)-(3,1))
        │   │   ├── flags: decimal
        │   │   └── value: 1
        │   ├── pattern:
        │   │   @ FindPatternNode (location: (3,5)-(3,15))
        │   │   ├── constant: ∅
        │   │   ├── left:
        │   │   │   @ SplatNode (location: (3,6)-(3,7))
        │   │   │   ├── operator_loc: (3,6)-(3,7) = "*"
        │   │   │   └── expression: ∅
        │   │   ├── requireds: (length: 1)
        │   │   │   └── @ IntegerNode (location: (3,9)-(3,11))
        │   │   │       ├── flags: decimal
        │   │   │       └── value: 42
        │   │   ├── right:
        │   │   │   @ SplatNode (location: (3,13)-(3,14))
        │   │   │   ├── operator_loc: (3,13)-(3,14) = "*"
        │   │   │   └── expression: ∅
        │   │   ├── opening_loc: (3,5)-(3,6) = "["
        │   │   └── closing_loc: (3,14)-(3,15) = "]"
        │   └── operator_loc: (3,2)-(3,4) = "in"
        └── @ MatchPredicateNode (location: (4,0)-(4,17))
            ├── value:
            │   @ IntegerNode (location: (4,0)-(4,1))
            │   ├── flags: decimal
            │   └── value: 1
            ├── pattern:
            │   @ FindPatternNode (location: (4,5)-(4,17))
            │   ├── constant: ∅
            │   ├── left:
            │   │   @ SplatNode (location: (4,6)-(4,7))
            │   │   ├── operator_loc: (4,6)-(4,7) = "*"
            │   │   └── expression: ∅
            │   ├── requireds: (length: 1)
            │   │   └── @ LocalVariableTargetNode (location: (4,9)-(4,10))
            │   │       ├── name: :a
            │   │       └── depth: 0
            │   ├── right:
            │   │   @ SplatNode (location: (4,12)-(4,16))
            │   │   ├── operator_loc: (4,12)-(4,13) = "*"
            │   │   └── expression:
            │   │       @ LocalVariableTargetNode (location: (4,13)-(4,16))
            │   │       ├── name: :foo
            │   │       └── depth: 0
            │   ├── opening_loc: (4,5)-(4,6) = "["
            │   └── closing_loc: (4,16)-(4,17) = "]"
            └── operator_loc: (4,2)-(4,4) = "in"