(id ,string? "An id string for the grob. Depending on the typestting
backend being used, this id will be assigned to a group containing all of
the stencils that comprise a given grob. For example, in the svg backend,
(id ,string? "An id string for the grob. Depending on the typestting
backend being used, this id will be assigned to a group containing all of
the stencils that comprise a given grob. For example, in the svg backend,