Function interp_segments_grob 

fn interp_segments_grob(
    args: &[RValue],
    named: &[(String, RValue)],
    context: &BuiltinContext<'_>,
) -> Result<RValue, RError>

Create a segments grob object without drawing it.

@param x0,y0 start positions @param x1,y1 end positions @param gp graphical parameters @param name unique grob name @param vp viewport @return a segments grob object @namespace grid