System/Library/Frameworks/PencilKit.framework

PKMutableStroke.h

NSObject
>
PKStroke
>
_PKStrokeConcrete

@class UIColor;

@interface PKMutableStroke : _PKStrokeConcrete

@property (copy, nonatomic) UIColor *_color;

- (void)_setColor:(id)a0;
- (void)_setLocation:(struct CGPoint { double x0; double x1; })a0 atIndex:(unsigned long long)a1;

@end