diff --git a/Sources/COpenSwiftUI/include/OpenSwiftUI_SPI.h b/Sources/COpenSwiftUI/include/OpenSwiftUI_SPI.h
index fa28bc2..f29b2ff 100644
--- a/Sources/COpenSwiftUI/include/OpenSwiftUI_SPI.h
+++ b/Sources/COpenSwiftUI/include/OpenSwiftUI_SPI.h
@@ -1,27 +1,61 @@
 //
 //  OpenSwiftUI_SPI.h
-//
+//  OpenSwiftUI
 //
 //
 
 #ifndef OpenSwiftUI_SPI_h
 #define OpenSwiftUI_SPI_h
 
+#include "OpenSwiftUIBase.h"
+
+#if __has_include(<QuartzCore/CoreAnimation.h>)
+
+#import <QuartzCore/CoreAnimation.h>
+
+OPENSWIFTUI_ASSUME_NONNULL_BEGIN
+
+@interface CALayer (OpenSwiftUI_SPI)
+- (BOOL)hasBeenCommitted;
+@end
+
+OPENSWIFTUI_ASSUME_NONNULL_END
+
+#endif /* CoreAnimation.h */
+
 #if __has_include(<UIKit/UIKit.h>)
+
 #import <UIKit/UIKit.h>
+
+OPENSWIFTUI_ASSUME_NONNULL_BEGIN
+
 @interface UIApplication (OpenSwiftUI_SPI)
 - (void)startedTest:(nullable NSString *)name;
 - (void)finishedTest:(nullable NSString *)name;
 - (void)failedTest:(nullable NSString *)name withFailure:(nullable NSError*)failure;
 - (nullable NSString *)_launchTestName;
 @end
+
+@interface UIView (OpenSwiftUI_SPI)
+- (BOOL)_shouldAnimatePropertyWithKey:(NSString *)key;
+@end
+
+OPENSWIFTUI_ASSUME_NONNULL_END
+
 #elif __has_include(<AppKit/AppKit.h>)
+
 #import <AppKit/AppKit.h>
+
+OPENSWIFTUI_ASSUME_NONNULL_BEGIN
+
 @interface NSApplication (OpenSwiftUI_SPI)
 - (void)startedTest:(nullable NSString *)name;
 - (void)finishedTest:(nullable NSString *)name;
 - (void)failedTest:(nullable NSString *)name withFailure:(nullable NSError*)failure;
 @end
-#endif
+
+OPENSWIFTUI_ASSUME_NONNULL_END
+
+#endif /* UIKit.h / AppKit.h */
 
 #endif /* OpenSwiftUI_SPI_h */
diff --git a/Sources/OpenSwiftUI/Integration/UIKit/_UIGraphicsView.swift b/Sources/OpenSwiftUI/Integration/UIKit/_UIGraphicsView.swift
new file mode 100644
index 0000000..0790c64
--- /dev/null
+++ b/Sources/OpenSwiftUI/Integration/UIKit/_UIGraphicsView.swift
@@ -0,0 +1,21 @@
+//
+//  _UIGraphicsView.swift
+//  OpenSwiftUI
+//
+//  Audited for RELEASE_2021
+//  Status: Complete
+
+#if os(iOS)
+internal import COpenSwiftUI
+import UIKit
+
+class _UIGraphicsView: UIView {
+    override func _shouldAnimateProperty(withKey key: String) -> Bool {
+        if layer.hasBeenCommitted() {
+            super._shouldAnimateProperty(withKey: key)
+        } else {
+            false
+        }
+    }
+}
+#endif