extern static IntPtr CGPatternCreate(/* void* */ IntPtr info, CGRect bounds, CGAffineTransform matrix, /* CGFloat */ nfloat xStep, /* CGFloat */ nfloat yStep, CGPatternTiling tiling, bool isColored, /* const CGPatternCallbacks* */ ref CGPatternCallbacks callbacks);
extern static IntPtr CGPatternCreate (/* void* */ IntPtr info, CGRect bounds, CGAffineTransform matrix, /* CGFloat */ nfloat xStep, /* CGFloat */ nfloat yStep, CGPatternTiling tiling, bool isColored, /* const CGPatternCallbacks* */ ref CGPatternCallbacks callbacks);