import { ReactElement } from 'react';
import { ShadowStyleProps } from '../types/react/ShadowStyleProps';
/**
 * Injects CSS text into the ShadowRoot that surrounds it.
 *
 * Replaces the per-widget DrawerContentStyles components (identical in the
 * alerts and unacknowledged-bulletins widgets). Renders a hidden anchor, finds
 * the enclosing ShadowRoot via its root node (falling back to
 * `fallbackHostSelector` for content portaled elsewhere), and appends/updates a
 * single `<style>` keyed by `styleId` so re-renders never duplicate it.
 * @param {ShadowStyleProps} props - The CSS and targeting options.
 * @returns {ReactElement} A hidden anchor element.
 */
export declare const ShadowStyle: ({ css, styleId, fallbackHostSelector, }: ShadowStyleProps) => ReactElement;
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