/**
 * Monkeypatch document.createElement to auto-stamp all <style> elements
 * created after the CometChat bundle loads with a `data-cometchat-sdk` attribute.
 *
 * This MUST be imported as the very first import in the bundle entry point (index.tsx).
 *
 * How it works:
 * - Before the bundle loads, the host page may have already created <style> elements.
 *   Those won't have the marker.
 * - After this script runs, every new <style> element created via document.createElement
 *   will automatically get `data-cometchat-sdk="true"`.
 * - This covers: webpack style-loader injections, MUI/JSS runtime styles, CometChat Calls
 *   SDK styles (goober, .ccccn, .awssld), and any other SDK-created styles.
 * - Host page styles added dynamically AFTER the bundle loads will also get the marker,
 *   but that's acceptable because host pages rarely create <style> elements after load.
 *   The key insight: host styles that exist BEFORE the bundle loads are the ones that
 *   cause CSS conflicts, and those won't have the marker.
 *
 * The IframePortal then uses this marker to decide what to copy into the iframe:
 * - Has `data-cometchat-sdk` or `data-cometchat` → copy (SDK/widget style)
 * - Doesn't have either → block (host page style)
 */
declare const _origCreateElement: {
    <K extends keyof HTMLElementTagNameMap>(tagName: K, options?: ElementCreationOptions | undefined): HTMLElementTagNameMap[K];
    <K_1 extends keyof HTMLElementDeprecatedTagNameMap>(tagName: K_1, options?: ElementCreationOptions | undefined): HTMLElementDeprecatedTagNameMap[K_1];
    (tagName: string, options?: ElementCreationOptions | undefined): HTMLElement;
};