import { IDatasetTransform } from '@shujujiang/core/transform/dataset';
import { IField } from '@shujujiang/core/widget/dataset';
import { IWidgetModel } from '@shujujiang/core/widget/widgetmodel';
import { ECWidget } from '../../echarts/ecwidget';
import { IDataSetConditionCalculator } from '@shujujiang/core/widget/threshold';
export declare class SankeyChart extends ECWidget {
    composeOption(option: IWidgetModel): any;
    protected _wrapPointEvent(event: any): {
        data: {
            columns: IField[];
            values: (string | number)[][];
        };
        event: any;
    };
    protected invokeSelectPoints(calculator: IDataSetConditionCalculator): boolean;
    protected invokeClearSelectedPoints(): void;
    protected assembleSankeyWidget(chartOption: any, dataset: IDatasetTransform): any;
}