import { BaseChartSpecTransformer } from '@visactor/vchart';
import type { ICartesianAxisSpec } from '@visactor/vchart';
import type { ITimelineChartSpec } from './interface';
export declare class TimelineChartSpecTransformer<T extends ITimelineChartSpec = ITimelineChartSpec> extends BaseChartSpecTransformer<T> {
    protected _getDefaultSeriesSpec(spec: T): any;
    protected _setDefaultXAxisSpec(spec: T): ICartesianAxisSpec;
    protected _setDefaultYAxisSpec(spec: T): ICartesianAxisSpec;
    protected _transformAxisSpec(spec: T): void;
    transformSpec(spec: T): void;
}