import { Bud } from '@roots/bud-framework/bud';
import { Extension } from '@roots/bud-framework/extension';
import { type DefinePlugin } from '@roots/bud-support/webpack';
/**
 * Define plugin configuration
 */
export default class BudDefine extends Extension<DefinePlugin['definitions'], DefinePlugin> {
    /**
     * {@link Extension.register}
     */
    register({ env }: Bud): Promise<void>;
    /**
     * {@link Extension.when}
     */
    when(): boolean;
}