Program {
    ast: Block(
        [
            Statement(
                Struct {
                    name: Ident(
                        "foo_t",
                    ),
                    fields: [],
                },
            ),
            Statement(
                Struct {
                    name: Ident(
                        "bar_t",
                    ),
                    fields: [
                        (
                            Ident(
                                "a",
                            ),
                            Ref {
                                inner: Owned(
                                    Ident(
                                        "bar_t",
                                    ),
                                ),
                                mutable: false,
                            },
                        ),
                    ],
                },
            ),
        ],
    ),
    structs: {},
    enums: {},
    types: {},
    functions: {},
    member_functions: {},
}