@class UIView; @interface _UIConstraintBasedLayoutHostingView : UIView { BOOL _hasAddedConstraints; } @property (retain, nonatomic) UIView *hostedView; + (BOOL)requiresConstraintBasedLayout; - (void)_intrinsicContentSizeInvalidatedForChildView:(id)a0; - (void)willRemoveSubview:(id)a0; - (struct { double x0; double x1; })_baselineOffsetsAtSize:(struct CGSize { double x0; double x1; })a0; - (void)updateConstraints; - (struct UIEdgeInsets { double x0; double x1; double x2; double x3; })alignmentRectInsets; - (id)initWithHostedView:(id)a0; - (BOOL)_layoutHeightDependsOnWidth; - (void)constraintsDidChangeInEngine:(id)a0; - (void)_scheduleUpdateConstraintsPassAsEngineHostNeedingLayout:(BOOL)a0; - (struct CGSize { double x0; double x1; })_layoutSizeThatFits:(struct CGSize { double x0; double x1; })a0 fixedAxes:(unsigned long long)a1; - (void)_layoutMetricsInvalidatedForHostedView; - (void)_setFrameWithAlignmentRect:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0; - (struct CGSize { double x0; double x1; })sizeThatFits:(struct CGSize { double x0; double x1; })a0; @end