[
    Expression {
        expr: AssignmentOperation(
            Assign {
                left: List {
                    items: [
                        ListItem {
                            key: None,
                            value: Variable(
                                Variable {
                                    start: (
                                        3,
                                        6,
                                    ),
                                    name: "a",
                                    end: (
                                        3,
                                        8,
                                    ),
                                },
                            ),
                        },
                    ],
                },
                span: (
                    3,
                    10,
                ),
                right: Variable(
                    Variable {
                        start: (
                            3,
                            12,
                        ),
                        name: "foo",
                        end: (
                            3,
                            16,
                        ),
                    },
                ),
            },
        ),
    },
]