Interface ServiceLineBillingCycle<DateType>

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