export declare class NgxProgressIndicatorConfig {
    /**
     * The size (height) of the progress indicator.
     * Numeric values get converted to px. */
    size: number | string;
    /**
     * Color of the progress indicator. Also used for the glow
     * around the indicator. */
    color: string;
    /**
     * Class name used for the progress indicator element. */
    className: string;
    /**
     * How many milliseconds to wait before the progress indicator
     * animation starts after calling .start(). */
    delay: number;
}