/** Core */
import { Generic } from "cmf.core/src/core";
/** Model */
import { RealTimeChartPoint } from "./realTimeChartModel";
/**
 * Real time chart Util Class
 */
export declare class RealTimeChartUtil extends Generic {
    /**
     * Check if a real time chart point is valid
     * @param scale Scale to check validity
     * @returns True if scale is valid false otherwise
     */
    static isValidChartPoint(point: RealTimeChartPoint): boolean;
    /**
     * Calculate foreground color
     */
    calculateForegroundColor(backgroundColor: string): string;
}