import { ScaleTime } from 'd3-scale';
import { Observation } from 'fhir/r3';
type Props = {
    dateRange: [Date, Date];
    enabled?: boolean;
};
export type SleepChartData = ReturnType<typeof useSleepChartData>;
export declare const useSleepChartData: (props: Props) => {
    isFetching: boolean;
    sleepData: Observation[];
    xDomain: ScaleTime<number, number>;
    dateRange: [Date, Date];
};
export {};