/**
 * Will remove keyframes that do not affect shape of the curve significantly. The significance degree is determined by the error tolerance
 * Intended to reduce complexity of a curve to improve performance and lower memory usage
 * @param {AnimationCurve} curve
 * @param {number} [error_tolerance] how much of a loss to accept, this is relative to normalized value bounds of the curve
 */
export function animation_curve_optimize(curve: AnimationCurve, error_tolerance?: number): void;
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