@ ProgramNode (location: (1,0)-(3,1))
├── flags: ∅
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(3,1))
    ├── flags: ∅
    └── body: (length: 2)
        ├── @ StringNode (location: (1,0)-(2,2))
        │   ├── flags: newline
        │   ├── opening_loc: (1,0)-(1,1) = "\""
        │   ├── content_loc: (1,1)-(2,1) = "a\nb"
        │   ├── closing_loc: (2,1)-(2,2) = "\""
        │   └── unescaped: "a\nb"
        └── @ IntegerNode (location: (3,0)-(3,1))
            ├── flags: newline, static_literal, decimal
            └── value: 1
