Direct cast

Author: russcam

src/Nest/CommonAbstractions/LazyDocument/LazyDocumentJsonConverter.cs

@@ -8,7 +8,7 @@ internal class LazyDocumentJsonConverter : JsonConverter
 	{
 		public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
 		{
-			var d = value as LazyDocument;
+			var d = (LazyDocument)value;
 			if (d?._Value == null)
 			{
 				writer.WriteNull();