class AppearancePrefs;
class TimeFormatHMS;
class TimeFormatHMSF;
+class TimeFormatTimecode;
class TimeFormatSamples;
class TimeFormatFrames;
class TimeFormatHex;
class GrabFocusPolicy;
class ActivateFocusPolicy;
class DeactivateFocusPolicy;
+class AutoRotate;
class ForwardRenderDisplacement;
class HighlightInverseColor;
class YuvColorSpace;