# System.Runtime.InteropServices.JavaScript

``` diff
 namespace System.Runtime.InteropServices.JavaScript {
     [CLSCompliantAttribute(false)]
     [EditorBrowsableAttribute(EditorBrowsableState.Never)]
     [SupportedOSPlatformAttribute("browser")]
     public struct JSMarshalerArgument {
-        public delegate void ArgumentToJSCallback<T>(ref JSMarshalerArgument arg, T value);
+        [EditorBrowsableAttribute(EditorBrowsableState.Never)]
+        public delegate void ArgumentToJSCallback<T>(ref JSMarshalerArgument arg, T value);
-        public delegate void ArgumentToManagedCallback<T>(ref JSMarshalerArgument arg, out T value);
+        [EditorBrowsableAttribute(EditorBrowsableState.Never)]
+        public delegate void ArgumentToManagedCallback<T>(ref JSMarshalerArgument arg, out T value);
     }
 }
```

