void metrics(MathMetricsInfo const & mi) const;
/// draw background if locked
void draw(MathPainterInfo & pi, int x, int y) const;
+ /// draw angular markers
+ void drawMarkers(MathPainterInfo & pi, int x, int y) const;
/// appends itself with macro arguments substituted
void substitute(MathMacro const & macro);
/// identifies NestInsets