[
    Expression {
        expression: Variable(
            BracedVariableVariable(
                BracedVariableVariable {
                    start: (
                        1,
                        7,
                    ),
                    variable: LiteralString {
                        span: (
                            1,
                            9,
                        ),
                        value: "foo",
                    },
                    end: (
                        1,
                        14,
                    ),
                },
            ),
        ),
        end: (
            1,
            15,
        ),
    },
]
