static Stencil blank (Box b);
static Stencil filled_box (Box b);
static Stencil round_filled_box (Box b, Real blotdiameter);
static Stencil repeat_slash (Real w, Real slope, Real th);
static Stencil horizontal_line (Interval w, Real th);
static Stencil triangle (Interval, Real, Real);
static Stencil blank (Box b);
static Stencil filled_box (Box b);
static Stencil round_filled_box (Box b, Real blotdiameter);
static Stencil repeat_slash (Real w, Real slope, Real th);
static Stencil horizontal_line (Interval w, Real th);
static Stencil triangle (Interval, Real, Real);