@ ProgramNode (location: (1,0)-(2,6))
├── flags: ∅
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(2,6))
    ├── flags: ∅
    └── body: (length: 1)
        └── @ StringNode (location: (1,0)-(2,6))
            ├── flags: newline
            ├── opening_loc: (1,0)-(1,1) = "\""
            ├── content_loc: (1,1)-(2,5) = "A\nB\\nCC"
            ├── closing_loc: (2,5)-(2,6) = "\""
            └── unescaped: "A\nB\nCC"
