Added only the source file (#18175)

Author: taras

src/lib/es2017.object.d.ts

@@ -22,4 +22,10 @@ interface ObjectConstructor {
      * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
      */
     entries(o: any): [string, any][];
+
+    /**
+     * Returns an object containing all own property descriptors of an object
+     * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
+     */
+    getOwnPropertyDescriptors<T>(o: T): {[P in keyof T]: TypedPropertyDescriptor<T[P]>} & { [x: string]: PropertyDescriptor };
 }