def METHOD_NAME(
    cls,
    mask,
    content,
    valid_when,
    lsb_order,
    *,
    parameters=None,
    form_key=None,
):
    if content.is_union:
        return content._union_of_optionarrays("i64", parameters)
    elif content.is_indexed or content.is_option:
        return ak.forms.IndexedOptionForm.METHOD_NAME(
            "i64",
            content,
            parameters=parameters,
        )
    else:
        return cls(
            mask,
            content,
            valid_when,
            lsb_order,
            parameters=parameters,
            form_key=form_key,
        )