Display function signatures instead of just "Function".

client/lib/components/parameters.dart

Index: client/lib/components/parameters.dart
diff --git a/client/lib/components/parameters.dart b/client/lib/components/parameters.dart
index 1331474c435bcd17079828aa960b4216533223bc..e348bb860fb91ae775df9049ec557f523429767e 100644
--- a/client/lib/components/parameters.dart
+++ b/client/lib/components/parameters.dart
@@ -11,12 +11,16 @@ import 'package:polymer/polymer.dart';
 import 'package:dartdoc_viewer/item.dart';
 import 'package:dartdoc_viewer/member.dart';
 
+import 'closure.dart';
 import 'type.dart';
 
 @CustomTag("dartdoc-parameter")
 class ParameterElement extends DartdocElement {
   @published List<Parameter> parameters = const [];
 
+
+  factory ParameterElement() => new Element.tag('dartdoc-parameter');
+
   ParameterElement.created() : super.created();
 
   void parametersChanged() {
@@ -52,13 +56,21 @@ class ParameterElement extends DartdocElement {
         outerSpan.append(new TypeElement()..type = element.type);
         space = ' ';
       }
-      var parameterName = new AnchorElement()
-        ..text = element.name
-        ..href = element.prefixedAnchorHref
-        ..id = element.anchorHrefLocation.anchor;
+
       outerSpan.appendText(space);
-      outerSpan.append(parameterName);
+      if (element.functionDeclaration != null) {
+        outerSpan.append(
+            new ClosureElement()..closure = element.functionDeclaration);
+      } else {
+        var parameterName = new AnchorElement()
+          ..text = element.name
+          ..href = element.prefixedAnchorHref
+          ..id = element.anchorHrefLocation.anchor;
+
+        outerSpan.append(parameterName);
+      }
       outerSpan.appendText(element.decoration);
+
       if (className == 'required' && optional.isNotEmpty ||
           element != elements.last) {
         outerSpan.appendText(', ');
@@ -71,4 +83,4 @@ class ParameterElement extends DartdocElement {
     }
     this.append(outerSpan);
   }
-}
+}