Fix vb

Author: CyrusNajmabadi

src/EditorFeatures/Test2/IntelliSense/CSharpCompletionCommandHandlerTests_Await.vb

@@ -5,8 +5,7 @@
 Namespace Microsoft.CodeAnalysis.Editor.UnitTests.IntelliSense
     <UseExportProvider>
     <Trait(Traits.Feature, Traits.Features.Completion)>
-    Public Class CSharpCompletionCommandHandlerTests_Await
-
+    Public NotInheritable Class CSharpCompletionCommandHandlerTests_Await
         Private Shared Function GetTestClassDocument(containerHasAsyncModifier As Boolean, testExpression As String) As XElement
             Return _
 <Document>

src/Features/VisualBasic/Portable/Completion/CompletionProviders/AwaitCompletionProvider.vb

@@ -43,7 +43,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.Completion.Providers
             Throw ExceptionUtilities.Unreachable
         End Function
 
-        Protected Overrides Function GetReturnTypeChangeAsync(semanticModel As SemanticModel, declaration As SyntaxNode, cancellationToken As CancellationToken) As Task(Of TextChange?)
+        Protected Overrides Function GetReturnTypeChangeAsync(solution As Solution, semanticModel As SemanticModel, declaration As SyntaxNode, cancellationToken As CancellationToken) As Task(Of TextChange?)
             ' Todo: Add support if desired.
             Return SpecializedTasks.Default(Of TextChange?)
         End Function