@ ProgramNode (location: (1,0)-(1,5))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,5))
    └── body: (length: 1)
        └── @ ArrayNode (location: (1,0)-(1,5))
            ├── flags: ∅
            ├── elements: (length: 0)
            ├── opening_loc: (1,0)-(1,3) = "%W("
            └── closing_loc: (1,4)-(1,5) = ")"
