Commit patch: https://codereview.chromium.org/10914320/

pkg/args/lib/args.dart

Index: pkg/args/lib/args.dart
diff --git a/pkg/args/lib/args.dart b/pkg/args/lib/args.dart
index b49bc1a3dace91a51a128c0bbccec251fc0d963f..dd77d3767e97989d0d79b9a42e7c6a626620c121 100644
--- a/pkg/args/lib/args.dart
+++ b/pkg/args/lib/args.dart
@@ -239,14 +239,14 @@ class ArgParser {
    */
   void addOption(String name, [String abbr, String help, List<String> allowed,
       Map<String, String> allowedHelp, String defaultsTo,
-      void callback(bool value), bool allowMultiple = false]) {
+      void callback(value), bool allowMultiple = false]) {
     _addOption(name, abbr, help, allowed, allowedHelp, defaultsTo,
         callback, isFlag: false, allowMultiple: allowMultiple);
   }
 
   void _addOption(String name, String abbr, String help, List<String> allowed,
       Map<String, String> allowedHelp, defaultsTo,
-      void callback(bool value), [bool isFlag, bool negatable = false,
+      void callback(value), [bool isFlag, bool negatable = false,
       bool allowMultiple = false]) {
     // Make sure the name isn't in use.
     if (_options.containsKey(name)) {