import * as React from 'react';
/** @internal Walks the elements a consumer declared in `children`, reporting each one's component `displayName` and props, needed on the server where registration effects don't run. */
export declare function forEachDeclaredElement(children: React.ReactNode, visit: (displayName: string | undefined, props: Record<string, unknown>) => void): void;
/** Whether `children` declares an element whose component `displayName` is `displayName`. @internal */
export declare function hasDeclaredChild(children: React.ReactNode, displayName: string): boolean;