@ ProgramNode (location: (1,0)-(1,8))
├── flags: ∅
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,8))
    ├── flags: ∅
    └── body: (length: 1)
        └── @ XStringNode (location: (1,0)-(1,8))
            ├── flags: newline
            ├── opening_loc: (1,0)-(1,1) = "`"
            ├── content_loc: (1,1)-(1,7) = "foobar"
            ├── closing_loc: (1,7)-(1,8) = "`"
            └── unescaped: "foobar"
