def get_wrapper_class_name(class_name):
    """Gets the default wrapper class name for a Strata class name."""
    components = class_name.split(".")
    if tuple(components[:3]) != ("com", "opengamma", "strata"):
        raise Exception(f"{class_name} doesn't look like a Strata class")
    return "com.exceljava.strataexcel.generated." + ".".join(components[3:]) + "XL";