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