import type { IConvertContext } from '../../IConvertContext';
import type { IConvertSettings } from '../../IConvertSettings';
import type { Util } from '../../Util';
import type { IDirectiveContext, IDirectiveNodeHandlerOutput } from './DirectiveNodeHandlerAdapter';
import { DirectiveNodeHandlerAdapter } from './DirectiveNodeHandlerAdapter';
/**
 * A handler for optional directives.
 */
export declare class DirectiveNodeHandlerOptional extends DirectiveNodeHandlerAdapter {
    constructor(util: Util, settings: IConvertSettings);
    handle(_directiveContext: IDirectiveContext, _convertContext: IConvertContext): IDirectiveNodeHandlerOutput;
}