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