Add existing to tracked

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

@@ -0,0 +1,38 @@
+// @ts-check
+
+// Note, these values map directly to ion asset ids.
+
+/**
+ * The types of imagery provided by {@link createWorldImagery}.
+ *
+ * @enum {number}
+ */
+const IonWorldImageryStyle = {
+  /**
+   * Aerial imagery.
+   *
+   * @type {number}
+   * @constant
+   */
+  AERIAL: 2,
+
+  /**
+   * Aerial imagery with a road overlay.
+   *
+   * @type {number}
+   * @constant
+   */
+  AERIAL_WITH_LABELS: 3,
+
+  /**
+   * Roads without additional imagery.
+   *
+   * @type {number}
+   * @constant
+   */
+  ROAD: 4,
+};
+
+Object.freeze(IonWorldImageryStyle);
+
+export default IonWorldImageryStyle;