import { CssHandle, CssOptions } from './CssHandle';
import { RuleSetCondition, RuleSetLoader } from 'webpack';
interface LessOptions extends CssOptions {
    'less-loader': {
        lessOptions: {
            modifyVars: object | string;
            javascriptEnabled: boolean;
        };
        additionalData: string | (() => string);
    };
}
export declare class Less extends CssHandle<LessOptions> {
    additionalData(data: string | (() => string)): this;
    protected test(): RuleSetCondition;
    protected loaders(): RuleSetLoader[];
}
export {};