function PickId(pickObjects, key, color) {
  this._pickObjects = pickObjects;
  this.key = key;
  this.color = color;
}
Gets the object associated with a pick color.

@param {Color} pickColor The pick color.
@returns {object} The object associated with the pick color, or undefined if no object is associated with that color.

@example
const object = context.getObjectByPickColor(pickColor);

@see Context#createPickId