/**
 * Theme application logic
 */
/**
 * Applies a theme to the document.
 *
 * @returns true when the theme's CSS is confirmed loaded, false when the
 *   theme could not be resolved or its stylesheet failed to load (the
 *   root attributes/class are still applied in the latter case)
 */
export declare function applyTheme(doc: Document, themeId: string): Promise<boolean>;
/**
 * Gets the current theme from classes or returns default
 */
export declare function getCurrentTheme(doc: Document, defaultTheme: string): string;
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