import type { Observable } from 'rxjs';
/**
 * Utility hook which provides the current value of the given observable.
 *
 * @param observable$ the observable to read data from.
 * @param defaultValue a default value. Used when the observable data can't be read or emits an error - must be stable.
 */
export declare const useObservableValue: <T>(observable$: Observable<T>, defaultValue?: T) => T;