Add existing to tracked

node_modules/@cesium/engine/Source/Scene/SunLight.js

@@ -0,0 +1,31 @@
+import Color from "../Core/Color.js";
+import Frozen from "../Core/Frozen.js";
+
+/**
+ * A directional light source that originates from the Sun.
+ *
+ * @param {object} [options] Object with the following properties:
+ * @param {Color} [options.color=Color.WHITE] The light's color.
+ * @param {number} [options.intensity=2.0] The light's intensity.
+ *
+ * @alias SunLight
+ * @constructor
+ */
+function SunLight(options) {
+  options = options ?? Frozen.EMPTY_OBJECT;
+  /**
+   * The color of the light.
+   * @type {Color}
+   * @default Color.WHITE
+   */
+  this.color = Color.clone(options.color ?? Color.WHITE);
+
+  /**
+   * The intensity of the light.
+   * @type {number}
+   * @default 2.0
+   */
+  this.intensity = options.intensity ?? 2.0;
+}
+
+export default SunLight;