export declare class PerformanceEvaluator {
    private static _instance;
    private _eval;
    static get instance(): PerformanceEvaluator;
    /**
     * Continue the performance evaluation.
     *
     * @param id
     */
    continueSection(sectionId: string): void;
    /**
     * End the performance evaluation and calculate the duration.
     *
     * @param id
     */
    end(): void;
    /**
     * End the performance evaluation of a section and calculate the duration.
     *
     * @param id
     */
    endSection(sectionId: string): void;
    /**
     * Get the evaluation data for a specific id.
     *
     * @param id
     */
    getEvaluation(): {
        start: number;
        section: {
            [key: string]: {
                start: number;
                continued?: number;
                end?: number;
                duration?: number;
            };
        };
        end?: number;
        duration?: number;
    } | undefined;
    /**
     * Get the evaluation data for a specific id.
     *
     * @param id
     */
    getEvaluationToString(): string;
    /**
     * Pause the performance evaluation.
     *
     * @param id
     */
    pauseSection(sectionId: string): void;
    /**
     * Start the evaluation with a specific id.
     *
     * @param id
     */
    start(time?: number): void;
    /**
     * Start the evaluation of a section with a specific id.
     *
     * @param id
     */
    startSection(sectionId: string, time?: number): void;
}
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