static Stencil make_dashed_line (Real th, Offset from, Offset to, Real, Real);
static Stencil make_line (Real th, Offset from, Offset to);
static Stencil make_arrow (Offset beg, Offset end, Real thick,
static Stencil make_dashed_line (Real th, Offset from, Offset to, Real, Real);
static Stencil make_line (Real th, Offset from, Offset to);
static Stencil make_arrow (Offset beg, Offset end, Real thick,