Reapply "Rename mappedBy to map."

pkg/serialization/lib/src/serialization_rule.dart

Index: pkg/serialization/lib/src/serialization_rule.dart
diff --git a/pkg/serialization/lib/src/serialization_rule.dart b/pkg/serialization/lib/src/serialization_rule.dart
index 311563c17d21fe712b811679765673f5de946ba2..5c397b06d7707e95aed20ee8574f09d358965ed1 100644
--- a/pkg/serialization/lib/src/serialization_rule.dart
+++ b/pkg/serialization/lib/src/serialization_rule.dart
@@ -479,7 +479,7 @@ class _LazyMap implements Map {
 
   // These operations will work, but may be expensive, and are probably
   // best avoided.
-  get _inflated => keysAndValues(_raw).mappedBy(_reader.inflateReference);
+  get _inflated => keysAndValues(_raw).map(_reader.inflateReference);
   bool containsValue(x) => _inflated.containsValue(x);
   Iterable get values => _inflated.values;
   void forEach(f) => _inflated.forEach(f);
@@ -518,7 +518,7 @@ class _LazyList extends Iterable implements List {
   // These operations, and other inherited methods that iterate over the whole
   // list will work, but may be expensive, and are probably
   // best avoided.
-  List get _inflated => _raw.mappedBy(_reader.inflateReference);
+  List get _inflated => _raw.map(_reader.inflateReference);
   Iterator get iterator => _inflated.iterator;
   indexOf(x, [pos = 0]) => _inflated.toList().indexOf(x);
   lastIndexOf(x, [pos]) => _inflated.toList().lastIndexOf(x);