import { TextSplittableAction } from './splittable-action.abstract';
import { Annotation } from '../annotations/annotation.abstract';
/**
 * Action to toggle the underline annotation
 */
export declare class UnderlineAnnotationAction extends TextSplittableAction {
  isFlushable: boolean;
  underline: boolean;
  constructor(underline: boolean);
  /**
   * Converts the action to an annotation
   *
   * @returns {Annotation} the annotation
   */
  toAnnotation(): Annotation;
}
