def METHOD_NAME(file_name: str) -> IdentifiedJsonMain:
    """Return a IdentifiedJsonMain with trivial placeholder data."""
    return IdentifiedJsonMain(
        original_file=BufferedFile(
            name=file_name,
            contents=b"",
            path=None,
        ),
        unvalidated_json={},
        schema_version=123,
        robot_type="OT-2 Standard",
        metadata={},
    )