@class NSTextTableBlock; @interface NSTextBlockLayoutHelper : NSObject { NSTextTableBlock *_block; struct _NSRange { unsigned long long location; unsigned long long length; } _charRange; struct _NSRange { unsigned long long location; unsigned long long length; } _glyphRange; struct CGRect { struct CGPoint { double x; double y; } origin; struct CGSize { double width; double height; } size; } _layoutRect; struct CGRect { struct CGPoint { double x; double y; } origin; struct CGSize { double width; double height; } size; } _boundsRect; double _lMargin; double _lBorder; double _lPadding; double _tMargin; double _tBorder; double _tPadding; double _width; double _height; double _rPadding; double _rBorder; double _rMargin; double _bPadding; double _bBorder; double _bMargin; } - (void)dealloc; - (id)description; @end