import { DataLabelState } from "../../DataLabels/DataLabelState";
export declare class PolarDataLabelState extends DataLabelState {
    private cartesianCache;
    toCartesian(angle: number, radius: number): {
        x: number;
        y: number;
    };
    xCoord(index?: number): number;
    yCoord(index?: number): number;
    angleCoord(index?: number): number;
    radiusCoord(index?: number): number;
    private updateCache;
}