def METHOD_NAME(self) -> str:
    root = ET.Element("Types")
    root.set("xmlns", SCHEMAS.CONTENT_TYPES)
    ET.SubElement(
        root,
        "Override",
        PartName="/3D/3dmodel.model",
        ContentType=CONTENT_TYPES.MODEL,
    )
    ET.SubElement(
        root,
        "Override",
        PartName="/_rels/.rels",
        ContentType=CONTENT_TYPES.RELATION,
    )
    return ET.tostring(root, xml_declaration=True, encoding="utf-8")