Adding support for the OpenXR futures extension

modules/openxr/extensions/openxr_visibility_mask_extension.h

@@ -47,6 +47,11 @@
 // https://registry.khronos.org/OpenXR/specs/1.0/html/xrspec.html#XR_KHR_visibility_mask
 
 class OpenXRVisibilityMaskExtension : public OpenXRExtensionWrapper {
+	GDCLASS(OpenXRVisibilityMaskExtension, OpenXRExtensionWrapper);
+
+protected:
+	static void _bind_methods() {}
+
 public:
 	static OpenXRVisibilityMaskExtension *get_singleton();