@ ProgramNode (location: (1,0)-(1,7))
├── flags: ∅
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,7))
    ├── flags: ∅
    └── body: (length: 1)
        └── @ StringNode (location: (1,0)-(1,7))
            ├── flags: newline
            ├── opening_loc: (1,0)-(1,7) = "<<'eot'"
            ├── content_loc: (2,0)-(3,0) = "body\r\n"
            ├── closing_loc: (3,0)-(4,0) = "eot\n"
            └── unescaped: "body\n"
