export function getRelativeDateDomain(now, offset, rangeType, fieldName, fieldType) {
    const startOfNextDay = now.plus({ days: 1 }).startOf("day");
    let endDate = now.endOf("day");
    let startDate = endDate;
    switch (rangeType) {
        case "year_to_date": {
            const offsetParam = { years: offset };
            startDate = now.startOf("year").plus(offsetParam);
            endDate = now.endOf("day").plus(offsetParam);
            break;
        }
        case "last_week": {
            const offsetParam = { days: 7 * offset };
            endDate = endDate.plus(offsetParam);
            startDate = startOfNextDay.minus({ days: 7 }).plus(offsetParam);
            break;
        }
        case "last_month": {
            const offsetParam = { days: 30 * offset };
            endDate = endDate.plus(offsetParam);
            startDate = startOfNextDay.minus({ days: 30 }).plus(offsetParam);
            break;
        }
        case "last_three_months": {
            const offsetParam = { days: 90 * offset };
            endDate = endDate.plus(offsetParam);
            startDate = startOfNextDay.minus({ days: 90 }).plus(offsetParam);
            break;
        }
        case "last_six_months": {
            const offsetParam = { days: 180 * offset };
            endDate = endDate.plus(offsetParam);
            startDate = startOfNextDay.minus({ days: 180 }).plus(offsetParam);
            break;
        }
        case "last_year": {
            const offsetParam = { days: 365 * offset };
            endDate = endDate.plus(offsetParam);
            startDate = startOfNextDay.minus({ days: 365 }).plus(offsetParam);
            break;
        }
        case "last_three_years": {
            const offsetParam = { days: 3 * 365 * offset };
            endDate = endDate.plus(offsetParam);
            startDate = startOfNextDay.minus({ days: 3 * 365 }).plus(offsetParam);
            break;
        }
        default:
            return undefined;
    }

    let leftBound, rightBound;
    if (fieldType === "date") {
        leftBound = serializeDate(startDate);
        rightBound = serializeDate(endDate);
    } else {
        leftBound = serializeDateTime(startDate);
        rightBound = serializeDateTime(endDate);
    }

    return new Domain(["&", [fieldName, ">=", leftBound], [fieldName, "}

I want to inherit this function and modify it to use it. I don't know how to proceed, I tried several methods: patching etc... but nothing