[
    Interface {
        name: Identifier {
            start: (
                3,
                11,
            ),
            name: "s",
            end: (
                3,
                13,
            ),
        },
        attributes: [],
        extends: [],
        body: [],
    },
    Interface {
        name: Identifier {
            start: (
                5,
                11,
            ),
            name: "foo",
            end: (
                5,
                15,
            ),
        },
        attributes: [],
        extends: [
            Identifier {
                start: (
                    5,
                    23,
                ),
                name: "s",
                end: (
                    5,
                    25,
                ),
            },
        ],
        body: [
            Method(
                Method {
                    start: (
                        6,
                        5,
                    ),
                    end: (
                        6,
                        34,
                    ),
                    name: Identifier {
                        start: (
                            6,
                            21,
                        ),
                        name: "bar",
                        end: (
                            6,
                            24,
                        ),
                    },
                    attributes: [],
                    parameters: MethodParameterList {
                        start: (
                            6,
                            24,
                        ),
                        end: (
                            6,
                            26,
                        ),
                        members: [],
                    },
                    body: None,
                    modifiers: MethodModifierGroup {
                        modifiers: [
                            Public {
                                start: (
                                    6,
                                    5,
                                ),
                                end: (
                                    6,
                                    12,
                                ),
                            },
                        ],
                    },
                    return_type: Some(
                        ParentReference,
                    ),
                    by_ref: false,
                },
            ),
        ],
    },
]