Interface ServiceLineBillingCycle<DateType>

interface ServiceLineBillingCycle<DateType extends Date | string = string> {
    dailyDataUsages:
        | { dataUsageBins: DataBucket[]
        | null; date: DateType }[]
        | null;
    dataUsage: DataBucket[] | null;
    endDate: DateType;
    overageLines: OverageLine[] | null;
    startDate: DateType;
}