Address comments.
diff --git a/lib/src/canonicalized_map.dart b/lib/src/canonicalized_map.dart
index 17ff71e..5f97b25 100644
--- a/lib/src/canonicalized_map.dart
+++ b/lib/src/canonicalized_map.dart
@@ -133,15 +133,15 @@
   Map<K2, V2> retype<K2, V2>() => cast<K2, V2>();
 
   @override
-  V update(K key, V Function(V) update, {V Function()? ifAbsent}) => _base
-      .update(_canonicalize(key), (pair) {
+  V update(K key, V Function(V) update, {V Function()? ifAbsent}) =>
+      _base.update(_canonicalize(key), (pair) {
         var value = pair.value;
         var newValue = update(value);
         if (identical(newValue, value)) return pair;
         return MapEntry(key, newValue);
       },
-          ifAbsent: ifAbsent == null ? null : () => MapEntry(key, ifAbsent()))
-      .value;
+          ifAbsent:
+              ifAbsent == null ? null : () => MapEntry(key, ifAbsent())).value;
 
   @override
   void updateAll(V Function(K key, V value) update) =>
diff --git a/lib/src/combined_wrappers/combined_iterator.dart b/lib/src/combined_wrappers/combined_iterator.dart
index c903455..0d6088a 100644
--- a/lib/src/combined_wrappers/combined_iterator.dart
+++ b/lib/src/combined_wrappers/combined_iterator.dart
@@ -31,8 +31,7 @@
         if (iterators.current.moveNext()) {
           return true;
         }
-      }
-      while (iterators.moveNext());
+      } while (iterators.moveNext());
       _iterators = null;
     }
     return false;
diff --git a/lib/src/union_set_controller.dart b/lib/src/union_set_controller.dart
index 660e24e..ea3622a 100644
--- a/lib/src/union_set_controller.dart
+++ b/lib/src/union_set_controller.dart
@@ -26,7 +26,7 @@
   final UnionSet<E> set;
 
   /// The sets whose union is exposed through [set].
-  final _sets;
+  final Set<Set<E>> _sets;
 
   /// Creates a set of sets that provides a view of the union of those sets.
   ///