import { BaseChartSpecTransformer } from '@visactor/vchart';
import type { IPictogramChartSpec } from './interface';
import type { IPictogramSeriesSpec } from './series/interface';
export declare class PictogramChartSpecTransformer<T extends IPictogramChartSpec = IPictogramChartSpec> extends BaseChartSpecTransformer<T> {
    protected _isValidSeries(type: string): boolean;
    protected _getDefaultSeriesSpec(spec: IPictogramChartSpec): IPictogramSeriesSpec;
    transformSpec(spec: T): void;
}