Add existing to tracked

node_modules/@cesium/engine/Source/Renderer/PickId.js

@@ -0,0 +1,44 @@
+// @ts-check
+
+/** @import Color from "../Core/Color.js"; */
+/** @import {Destroyable} from "../Core/globalTypes.js"; */
+
+/**
+ * Represents a pickable object with a unique integer ID and picking color.
+ *
+ * @implements {Destroyable}
+ * @ignore
+ */
+class PickId {
+  /**
+   * @param {Map<number, object>} pickObjects
+   * @param {number} key
+   * @param {Color} color
+   */
+  constructor(pickObjects, key, color) {
+    this._pickObjects = pickObjects;
+
+    /** @type {number} */
+    this.key = key;
+
+    /** @type {Color} */
+    this.color = color;
+  }
+
+  /** @type {object} */
+  get object() {
+    return this._pickObjects.get(this.key);
+  }
+
+  set object(value) {
+    this._pickObjects.set(this.key, value);
+  }
+
+  /** @returns {void} */
+  destroy() {
+    this._pickObjects.delete(this.key);
+    return undefined;
+  }
+}
+
+export default PickId;