export interface GravatarOptions {
    size: number;
}
/**
 * Provides the url to a Gravatar image for an email
 *
 * - Returns null until the image has preloaded so letter avatars can be displayed while loading
 * - Returns null if the email does not have a Gravatar (the loaded image is a 404)
 */
export default function useGravatar(email: string, { size }: GravatarOptions): string | null;
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