#[inline] for the AsRef implementation.

This may be redundant since the function is generic and generic
functions are, in the current Rust compiler, always inlinable, but it
follows the general recommended practice of making trivial accessor
functions inlinable.

src/lib.rs

@@ -111,6 +111,7 @@ impl<W: HasRawWindowHandle> GraphicsContext<W> {
 
 impl<W: HasRawWindowHandle> AsRef<W> for GraphicsContext<W> {
     /// Equivalent to [`self.window()`](Self::window()).
+    #[inline]
     fn as_ref(&self) -> &W {
         self.window()
     }