function BoundingSphere(center, radius) {
  /**
   * The center point of the sphere.
   * @type {Cartesian3}
   * @default {@link Cartesian3.ZERO}
   */
  this.center = Cartesian3.clone(center ?? Cartesian3.ZERO);

  /**
   * The radius of the sphere.
   * @type {number}
   * @default 0.0
   */
  this.radius = radius ?? 0.0;
}
A bounding sphere with a center and a radius.
@alias BoundingSphere
@constructor

@param {Cartesian3} [center=Cartesian3.ZERO] The center of the bounding sphere.
@param {number} [radius=0.0] The radius of the bounding sphere.

@see AxisAlignedBoundingBox
@see BoundingRectangle
@see Packable