/**
 * A collection of rich text that will be displayed as a preview to another app.
 *
 * This is read-only except for a small group of whitelisted apps.
 */
export declare type Preview = {
    /**
     * Some fallback text to display if unable to display the full preview.
     */
    fallback?: string;
    /**
     * Text to display in the footer.
     */
    footer?: string;
    /**
     * Text to display in the header.
     */
    header?: string;
    /**
     * Where the header will link to.
     */
    header_link?: string;
    /**
     * HTML formatted text for the body of the preview.
     */
    html_text?: string;
    /**
     * Text for the body of the preview.
     */
    text?: string;
    /**
     * Text to display as the title.
     */
    title?: string;
    /**
     * Where to title will link to.
     */
    title_link?: string;
};