/**
 * Vega-Lite Plugin using BasePlugin architecture
 */
import { BasePlugin } from './base-plugin';
/**
 * AST node interface
 */
interface AstNode {
    type: string;
    lang?: string;
    value?: string;
}
/**
 * Vega-Lite Plugin implementation
 */
export declare class VegaLitePlugin extends BasePlugin {
    constructor();
    /**
     * Override extractContent to support both 'vega-lite' and 'vegalite'
     */
    extractContent(node: AstNode): string | null;
}
export {};