Reapply "Rename mappedBy to map."

pkg/serialization/lib/src/serialization_helpers.dart

Index: pkg/serialization/lib/src/serialization_helpers.dart
diff --git a/pkg/serialization/lib/src/serialization_helpers.dart b/pkg/serialization/lib/src/serialization_helpers.dart
index a9954733e610a3594f5a25fc64b5b1d9e6e72d01..9568c24dee7db223fe32fb46df89a1c06c8d0da3 100644
--- a/pkg/serialization/lib/src/serialization_helpers.dart
+++ b/pkg/serialization/lib/src/serialization_helpers.dart
@@ -77,7 +77,7 @@ abstract class MapLikeIterable {
    * [collection] is a List, it will be the same as the map() method if the
    * [key] parameter wasn't passed.
    */
-  mappedBy(Function f) {
+  map(Function f) {
     var result = copyEmpty();
     forEach((key, value) {
        result[key] = f(key, value);
@@ -131,9 +131,9 @@ values(x) {
 }
 
 mapValues(x, f) {
-  if (x is Set) return x.mappedBy(f).toSet();
-  if (x is Iterable) return x.mappedBy(f).toList();
-  if (x is Map) return new ListLikeIterable(x).mappedBy(f);
+  if (x is Set) return x.map(f).toSet();
+  if (x is Iterable) return x.map(f).toList();
+  if (x is Map) return new ListLikeIterable(x).map(f);
   throw new ArgumentError("Invalid argument");
 }
 
@@ -158,7 +158,7 @@ class ListLikeIterable {
    * [collection] is a List, it will be the same as if map() had been called
    * directly on [collection].
    */
-  mappedBy(Function f) {
+  map(Function f) {
       var result = new Map();
       collection.forEach((key, value) => result[key] = f(value));
       return result;
@@ -251,4 +251,4 @@ class IdentityMap<K, V> implements Map<K, V> {
 
   // Note that this is doing an equality comparison.
   bool containsValue(x) => values.contains(x);
-}
+}