Issue 13029. Quick fix to create a function for a Function typed named parameter.

pkg/analysis_server/lib/src/services/correction/fix_internal.dart

Index: pkg/analysis_server/lib/src/services/correction/fix_internal.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
index edd08626d30abb5d8388b9df6dd21e9e95c91091..e244723c1a039027cdabb9f59670699e5a0a6627 100644
--- a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
+++ b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
@@ -576,6 +576,7 @@ class FixProcessor {
           argument = nameNode;
         }
       }
+      argument = stepUpNamedExpression(argument);
       // should be argument of some invocation
       ParameterElement parameterElement = argument.bestParameterElement;
       if (parameterElement == null) {
@@ -583,6 +584,10 @@ class FixProcessor {
       }
       // should be parameter of function type
       DartType parameterType = parameterElement.type;
+      if (parameterType is InterfaceType && parameterType.isDartCoreFunction) {
+        ExecutableElement element = new MethodElementImpl('', -1);
+        parameterType = new FunctionTypeImpl.con1(element);
+      }
       if (parameterType is! FunctionType) {
         return;
       }