Move source code overload.

src/Generator/Generators/CodeGenerator.cs

@@ -61,6 +61,23 @@ namespace CppSharp.Generators
             return base.Generate();
         }
 
+        public virtual void GenerateFilePreamble(CommentKind kind)
+        {
+            var lines = new List<string>
+            {
+                "----------------------------------------------------------------------------",
+                "<auto-generated>",
+                "This is autogenerated code by CppSharp.",
+                "Do not edit this file or all your changes will be lost after re-generation.",
+                "</auto-generated>",
+                "----------------------------------------------------------------------------"
+            };
+
+            PushBlock(BlockKind.Header);
+            GenerateMultiLineComment(lines, kind);
+            PopBlock();
+        }
+
         public virtual void GenerateDeclarationCommon(Declaration decl)
         {
             if (decl.Comment != null)
@@ -146,22 +163,6 @@ namespace CppSharp.Generators
 
         #endregion
 
-        public virtual void GenerateFilePreamble(CommentKind kind)
-        {
-            var lines = new List<string>
-            {
-                "----------------------------------------------------------------------------",
-                "<auto-generated>",
-                "This is autogenerated code by CppSharp.",
-                "Do not edit this file or all your changes will be lost after re-generation.",
-                "</auto-generated>",
-                "----------------------------------------------------------------------------"
-            };
-
-            PushBlock(BlockKind.Header);
-            GenerateMultiLineComment(lines, kind);
-            PopBlock();
-        }
 
         #region Visitor methods