Add a new stub mapping

src/WireMock.Net/Server/IRespondWithAProviderGuid.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace WireMock.Server
+{
+    /// <summary>
+    /// IRespondWithAProviderGuid
+    /// </summary>
+    public interface IRespondWithAProviderGuid : IRespondWithAProvider
+    {
+        /// <summary>
+        /// Define a unique identifier for this mapping.
+        /// </summary>
+        /// <param name="guid">The unique identifier.</param>
+        /// <returns>The <see cref="IRespondWithAProviderGuid"/>.</returns>
+        IRespondWithAProviderGuid WithGuid(Guid guid);
+    }
+}