import { Observable } from "rxjs";
/**
 * An operator to extract a property from an observable of an object.
 * Useful for pulling a specific prop from an observable of React props.
 * @param prop - The name of the object property
 * @returns - An observable of the object's property
 */
export declare function getProp<Props, T extends keyof Props>(prop: T): (props$: Observable<Props>, compare?: ((oldValue: Props[T], newValue: Props[T]) => boolean) | undefined) => Observable<Props[T]>;