Add TODO

Author: schmidt-sebastian

packages/firestore/lite/src/api/util.ts

@@ -23,6 +23,8 @@ import { Code, FirestoreError } from '../../../src/util/error';
  * This cast is used in the Lite and Full SDK to verify instance types for
  * arguments passed to the public API.
  */
+// TODO(firestoreexp): We can probably remove this since we now use APIExtractor
+// for our types and removed the interface.
 export function cast<T>(
   obj: object,
   // eslint-disable-next-line @typescript-eslint/no-explicit-any