import { Component, PropsWithChildren, RefForwardingComponent } from 'react';
import { LayoutRectangle } from 'react-native';
export type Handler = () => void;
export type Unsubscriber = () => void;
export type Unregistrator = () => void;
export type HandlerOf<T> = (value: T) => void;
export declare function forwardRef<T, P = {}>(component: RefForwardingComponent<T, PropsWithChildren<P>>): import("react").ForwardRefExoticComponent<import("react").PropsWithoutRef<PropsWithChildren<P>> & import("react").RefAttributes<T>>;
export declare function measure(component: Component): Promise<LayoutRectangle>;
export declare function measureInWindow(component: Component): Promise<LayoutRectangle>;