Move AddWebp to a extension method

src/ImageSharp/Configuration.cs

@@ -6,7 +6,6 @@ using System.Collections.Concurrent;
 using System.Collections.Generic;
 using SixLabors.ImageSharp.Formats;
 using SixLabors.ImageSharp.Formats.Bmp;
-using SixLabors.ImageSharp.Formats.Experimental.Webp;
 using SixLabors.ImageSharp.Formats.Gif;
 using SixLabors.ImageSharp.Formats.Jpeg;
 using SixLabors.ImageSharp.Formats.Png;
@@ -174,17 +173,6 @@ namespace SixLabors.ImageSharp
             };
         }
 
-        /// <summary>
-        /// Registers the webp format detector, encoder and decoder.
-        /// </summary>
-        public void AddWebp()
-        {
-            this.ImageFormatsManager.AddImageFormat(WebpFormat.Instance);
-            this.ImageFormatsManager.AddImageFormatDetector(new WebpImageFormatDetector());
-            this.ImageFormatsManager.SetDecoder(WebpFormat.Instance, new WebpDecoder());
-            this.ImageFormatsManager.SetEncoder(WebpFormat.Instance, new WebpEncoder());
-        }
-
         /// <summary>
         /// Creates the default instance with the following <see cref="IConfigurationModule"/>s preregistered:
         /// <see cref="PngConfigurationModule"/>

src/ImageSharp/Formats/WebP/ConfigurationExtensions.cs

@@ -0,0 +1,23 @@
+// Copyright (c) Six Labors.
+// Licensed under the Apache License, Version 2.0.
+
+namespace SixLabors.ImageSharp.Formats.Experimental.Webp
+{
+    /// <summary>
+    /// Helper methods for the Configuration.
+    /// </summary>
+    public static class ConfigurationExtensions
+    {
+        /// <summary>
+        /// Registers the webp format detector, encoder and decoder.
+        /// </summary>
+        /// <param name="configuration">The configuration.</param>
+        public static void AddWebp(this Configuration configuration)
+        {
+            configuration.ImageFormatsManager.AddImageFormat(WebpFormat.Instance);
+            configuration.ImageFormatsManager.AddImageFormatDetector(new WebpImageFormatDetector());
+            configuration.ImageFormatsManager.SetDecoder(WebpFormat.Instance, new WebpDecoder());
+            configuration.ImageFormatsManager.SetEncoder(WebpFormat.Instance, new WebpEncoder());
+        }
+    }
+}

tests/ImageSharp.Tests/Formats/WebP/WebPEncoderTests.cs

@@ -5,11 +5,10 @@ using SixLabors.ImageSharp.Formats.Experimental.Webp;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 using Xunit;
+using static SixLabors.ImageSharp.Tests.TestImages.WebP;
 
 namespace SixLabors.ImageSharp.Tests.Formats.Webp
 {
-    using static TestImages.WebP;
-
     [Trait("Format", "Webp")]
     public class WebpEncoderTests
     {