diff --git a/Lombiq.HelpfulExtensions/Extensions/Widgets/Migrations.cs b/Lombiq.HelpfulExtensions/Extensions/Widgets/Migrations.cs
index 3fecdc7c..4fa656fa 100644
--- a/Lombiq.HelpfulExtensions/Extensions/Widgets/Migrations.cs
+++ b/Lombiq.HelpfulExtensions/Extensions/Widgets/Migrations.cs
@@ -11,18 +11,16 @@ namespace Lombiq.HelpfulExtensions.Extensions.Widgets;
 
 public class Migrations(IContentDefinitionManager contentDefinitionManager) : DataMigration
 {
-    private readonly IContentDefinitionManager _contentDefinitionManager = contentDefinitionManager;
-
     public async Task<int> CreateAsync()
     {
-        await _contentDefinitionManager.AlterTypeDefinitionAsync(ContainerWidget, builder => builder
+        await contentDefinitionManager.AlterTypeDefinitionAsync(ContainerWidget, builder => builder
             .Securable()
             .Stereotype(CommonStereotypes.Widget)
             .WithPart("TitlePart", part => part.WithPosition("0"))
             .WithPart("FlowPart", part => part.WithPosition("1"))
         );
 
-        await _contentDefinitionManager.AlterTypeDefinitionAsync(HtmlWidget, builder => builder
+        await contentDefinitionManager.AlterTypeDefinitionAsync(HtmlWidget, builder => builder
             .Securable()
             .Stereotype(CommonStereotypes.Widget)
             .WithPart("HtmlBodyPart", part => part
@@ -34,7 +32,7 @@ await _contentDefinitionManager.AlterTypeDefinitionAsync(HtmlWidget, builder =>
             )
         );
 
-        await _contentDefinitionManager.AlterTypeDefinitionAsync(LiquidWidget, builder => builder
+        await contentDefinitionManager.AlterTypeDefinitionAsync(LiquidWidget, builder => builder
             .Securable()
             .Stereotype(CommonStereotypes.Widget)
             .WithPart("LiquidPart", part => part
@@ -42,12 +40,12 @@ await _contentDefinitionManager.AlterTypeDefinitionAsync(LiquidWidget, builder =
             )
         );
 
-        await _contentDefinitionManager.AlterTypeDefinitionAsync(MenuWidget, builder => builder
+        await contentDefinitionManager.AlterTypeDefinitionAsync(MenuWidget, builder => builder
             .Securable()
             .Stereotype(CommonStereotypes.Widget)
         );
 
-        await _contentDefinitionManager.AlterTypeDefinitionAsync(MarkdownWidget, builder => builder
+        await contentDefinitionManager.AlterTypeDefinitionAsync(MarkdownWidget, builder => builder
             .Securable()
             .Stereotype(CommonStereotypes.Widget)
             .WithPart("MarkdownBodyPart", part => part
@@ -55,7 +53,7 @@ await _contentDefinitionManager.AlterTypeDefinitionAsync(MarkdownWidget, builder
             )
         );
 
-        var contentItemWidgetPartName = await _contentDefinitionManager.AlterPartDefinitionAsync<ContentItemWidget>(builder => builder
+        var contentItemWidgetPartName = await contentDefinitionManager.AlterPartDefinitionAsync<ContentItemWidget>(builder => builder
             .WithField(part => part.ContentToDisplay, field => field
                 .WithDisplayName("Content to display")
                 .WithSettings(new ContentPickerFieldSettings
@@ -67,7 +65,7 @@ await _contentDefinitionManager.AlterTypeDefinitionAsync(MarkdownWidget, builder
             .WithField(part => part.GroupId, field => field.WithDisplayName("Group ID"))
         );
 
-        await _contentDefinitionManager.AlterTypeDefinitionAsync(WidgetTypes.ContentItemWidget, builder => builder
+        await contentDefinitionManager.AlterTypeDefinitionAsync(WidgetTypes.ContentItemWidget, builder => builder
             .Securable()
             .Stereotype(CommonStereotypes.Widget)
             .WithPart(contentItemWidgetPartName)
@@ -78,7 +76,7 @@ await _contentDefinitionManager.AlterTypeDefinitionAsync(WidgetTypes.ContentItem
 
     public async Task<int> UpdateFrom1Async()
     {
-        await _contentDefinitionManager.AlterTypeDefinitionAsync(ContainerWidget, builder => builder
+        await contentDefinitionManager.AlterTypeDefinitionAsync(ContainerWidget, builder => builder
             .WithPart("TitlePart", part => part.WithPosition("0"))
             .WithPart("FlowPart", part => part.WithPosition("1"))
         );
@@ -88,7 +86,7 @@ await _contentDefinitionManager.AlterTypeDefinitionAsync(ContainerWidget, builde
 
     public async Task<int> UpdateFrom2Async()
     {
-        await _contentDefinitionManager.AlterTypeDefinitionAsync(MenuWidget, builder => builder
+        await contentDefinitionManager.AlterTypeDefinitionAsync(MenuWidget, builder => builder
             .Securable()
             .Stereotype(CommonStereotypes.Widget)
         );
@@ -98,7 +96,7 @@ await _contentDefinitionManager.AlterTypeDefinitionAsync(MenuWidget, builder =>
 
     public async Task<int> UpdateFrom3Async()
     {
-        await _contentDefinitionManager.AlterTypeDefinitionAsync(MarkdownWidget, builder => builder
+        await contentDefinitionManager.AlterTypeDefinitionAsync(MarkdownWidget, builder => builder
             .Securable()
             .Stereotype(CommonStereotypes.Widget)
             .WithPart("MarkdownBodyPart", part => part
@@ -111,13 +109,13 @@ await _contentDefinitionManager.AlterTypeDefinitionAsync(MarkdownWidget, builder
 
     public async Task<int> UpdateFrom4Async()
     {
-        var contentItemWidgetPartName = await _contentDefinitionManager.AlterPartDefinitionAsync<ContentItemWidget>(builder => builder
+        var contentItemWidgetPartName = await contentDefinitionManager.AlterPartDefinitionAsync<ContentItemWidget>(builder => builder
             .WithField(part => part.ContentToDisplay, field => field.WithDisplayName("Content to display"))
             .WithField(part => part.DisplayType, field => field.WithDisplayName("Display type"))
             .WithField(part => part.GroupId, field => field.WithDisplayName("Group ID"))
         );
 
-        await _contentDefinitionManager.AlterTypeDefinitionAsync(WidgetTypes.ContentItemWidget, builder => builder
+        await contentDefinitionManager.AlterTypeDefinitionAsync(WidgetTypes.ContentItemWidget, builder => builder
             .Securable()
             .Stereotype(CommonStereotypes.Widget)
             .WithPart(contentItemWidgetPartName)