@ ProgramNode (location: (0...9))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...9))
    └── body: (length: 1)
        └── @ ArrayNode (location: (0...9))
            ├── elements: (length: 3)
            │   ├── @ SymbolNode (location: (3...4))
            │   │   ├── opening_loc: ∅
            │   │   ├── value_loc: (3...4) = "a"
            │   │   ├── closing_loc: ∅
            │   │   └── unescaped: "a"
            │   ├── @ SymbolNode (location: (5...6))
            │   │   ├── opening_loc: ∅
            │   │   ├── value_loc: (5...6) = "b"
            │   │   ├── closing_loc: ∅
            │   │   └── unescaped: "b"
            │   └── @ SymbolNode (location: (7...8))
            │       ├── opening_loc: ∅
            │       ├── value_loc: (7...8) = "c"
            │       ├── closing_loc: ∅
            │       └── unescaped: "c"
            ├── opening_loc: (0...3) = "%I("
            └── closing_loc: (8...9) = ")"
