[
    Expression {
        expression: Concat {
            left: Concat {
                left: LiteralString {
                    span: (
                        1,
                        7,
                    ),
                    value: "foo",
                },
                span: (
                    1,
                    13,
                ),
                right: LiteralString {
                    span: (
                        1,
                        15,
                    ),
                    value: "bar",
                },
            },
            span: (
                1,
                21,
            ),
            right: LiteralString {
                span: (
                    1,
                    23,
                ),
                value: "baz",
            },
        },
        end: (
            1,
            28,
        ),
    },
]
