import type { YooEditor } from '../types';
import type { IsMarkActiveOptions } from './types';
/**
 * Check if mark is active in current selection or specified block
 *
 * @param editor - YooEditor instance
 * @param options - Check mark active options
 * @returns True if mark is active, false otherwise
 *
 * @example
 * ```typescript
 * // Check if bold is active in current selection
 * const isBold = Marks.isActive(editor, { type: 'bold' });
 *
 * // Check if italic is active in specific block
 * const isItalic = Marks.isActive(editor, {
 *   type: 'italic',
 *   at: 0
 * });
 * ```
 */
export declare function isActive(editor: YooEditor, options: IsMarkActiveOptions): boolean;
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