/**
 * Cubic bezier interpolator for keyframe animation.
 *
 * The curve is defined by four points:
 *   P0 = (0, 0), P1 = handleOut, P2 = handleIn, P3 = (1, 1)
 *
 * Given a normalized time [0-1], returns a normalized value [0-1].
 *
 * @param time      - Normalized time in [0, 1]
 * @param handleOut - Outgoing control point [time, value], both in [0, 1]
 * @param handleIn  - Incoming control point [time, value], both in [0, 1]
 * @returns Normalized interpolated value
 */
export declare function bezierInterpolate(time: number, handleOut: [number, number], handleIn: [number, number]): number;