Declare the `equals` method in `Map`.
This is of course an override of the method inherited from `Object`, and its declaration matches exactly.
But it helps with some nullness checking that we're doing.
@@ -206,4 +206,7 @@ public interface Map<K, V> {
int size();
@JsNonNull Collection<V> values();
+
+ // Note: Explicit equals override helps an experimental JSpecify nullness checker.
+ boolean equals(Object o);
}
