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diff --git a/packages/sdl2.nuget.2.0.22/build/native/include/SDL_metal.h b/packages/sdl2.nuget.2.0.22/build/native/include/SDL_metal.h
new file mode 100644
index 00000000..eb308287
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+++ b/packages/sdl2.nuget.2.0.22/build/native/include/SDL_metal.h
@@ -0,0 +1,113 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/**
+ *  \file SDL_metal.h
+ *
+ *  Header file for functions to creating Metal layers and views on SDL windows.
+ */
+
+#ifndef SDL_metal_h_
+#define SDL_metal_h_
+
+#include "SDL_video.h"
+
+#include "begin_code.h"
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ *  \brief A handle to a CAMetalLayer-backed NSView (macOS) or UIView (iOS/tvOS).
+ *
+ *  \note This can be cast directly to an NSView or UIView.
+ */
+typedef void *SDL_MetalView;
+
+/**
+ *  \name Metal support functions
+ */
+/* @{ */
+
+/**
+ * Create a CAMetalLayer-backed NSView/UIView and attach it to the specified
+ * window.
+ *
+ * On macOS, this does *not* associate a MTLDevice with the CAMetalLayer on
+ * its own. It is up to user code to do that.
+ *
+ * The returned handle can be casted directly to a NSView or UIView. To access
+ * the backing CAMetalLayer, call SDL_Metal_GetLayer().
+ *
+ * \since This function is available since SDL 2.0.12.
+ *
+ * \sa SDL_Metal_DestroyView
+ * \sa SDL_Metal_GetLayer
+ */
+extern DECLSPEC SDL_MetalView SDLCALL SDL_Metal_CreateView(SDL_Window * window);
+
+/**
+ * Destroy an existing SDL_MetalView object.
+ *
+ * This should be called before SDL_DestroyWindow, if SDL_Metal_CreateView was
+ * called after SDL_CreateWindow.
+ *
+ * \since This function is available since SDL 2.0.12.
+ *
+ * \sa SDL_Metal_CreateView
+ */
+extern DECLSPEC void SDLCALL SDL_Metal_DestroyView(SDL_MetalView view);
+
+/**
+ * Get a pointer to the backing CAMetalLayer for the given view.
+ *
+ * \since This function is available since SDL 2.0.14.
+ *
+ * \sa SDL_MetalCreateView
+ */
+extern DECLSPEC void *SDLCALL SDL_Metal_GetLayer(SDL_MetalView view);
+
+/**
+ * Get the size of a window's underlying drawable in pixels (for use with
+ * setting viewport, scissor & etc).
+ *
+ * \param window SDL_Window from which the drawable size should be queried
+ * \param w Pointer to variable for storing the width in pixels, may be NULL
+ * \param h Pointer to variable for storing the height in pixels, may be NULL
+ *
+ * \since This function is available since SDL 2.0.14.
+ *
+ * \sa SDL_GetWindowSize
+ * \sa SDL_CreateWindow
+ */
+extern DECLSPEC void SDLCALL SDL_Metal_GetDrawableSize(SDL_Window* window, int *w,
+                                                       int *h);
+
+/* @} *//* Metal support functions */
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include "close_code.h"
+
+#endif /* SDL_metal_h_ */