[
    Class {
        name: Identifier {
            name: "s",
        },
        attributes: [],
        extends: None,
        implements: [],
        body: [],
        flags: [],
    },
    Class {
        name: Identifier {
            name: "foo",
        },
        attributes: [],
        extends: Some(
            Identifier {
                name: "s",
            },
        ),
        implements: [],
        body: [
            Method {
                name: Identifier {
                    name: "bar",
                },
                attributes: [],
                params: [],
                body: [
                    Return {
                        value: Some(
                            New {
                                target: Identifier {
                                    name: "s",
                                },
                                args: [],
                            },
                        ),
                    },
                ],
                flags: [
                    Public,
                ],
                return_type: Some(
                    ParentReference,
                ),
                by_ref: false,
            },
        ],
        flags: [],
    },
]