Rename mappedBy to map.

utils/pub/validator.dart

Index: utils/pub/validator.dart
diff --git a/utils/pub/validator.dart b/utils/pub/validator.dart
index 5ec0f233f5a808ba6c2a72b4dd68abb0acae1a86..4b417e983d2fce837f8657fefe018f898d1f17a3 100644
--- a/utils/pub/validator.dart
+++ b/utils/pub/validator.dart
@@ -53,12 +53,12 @@ abstract class Validator {
       new DirectoryValidator(entrypoint)
     ];
 
-    return Future.wait(validators.mappedBy((validator) => validator.validate()))
+    return Future.wait(validators.map((validator) => validator.validate()))
       .then((_) {
       var errors =
-          flatten(validators.mappedBy((validator) => validator.errors));
+          flatten(validators.map((validator) => validator.errors));
       var warnings =
-          flatten(validators.mappedBy((validator) => validator.warnings));
+          flatten(validators.map((validator) => validator.warnings));
 
       if (!errors.isEmpty) {
         log.error("Missing requirements:");