[ETimingTrackViewportDirtyFlags](API\Developer\TraceInsights\Insights\ViewModels\ETimingTrackViewportDirtyFlags) & operator^= ( [ETimingTrackViewportDirtyFlags](API\Developer\TraceInsights\Insights\ViewModels\ETimingTrackViewportDirtyFlags) & Lhs, [ETimingTrackViewportDirtyFlags](API\Developer\TraceInsights\Insights\ViewModels\ETimingTrackViewportDirtyFlags) Rhs )