Function interp_grid_polygon 

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

Draw a polygon on the grid graphics device.

@param x x-coordinates of vertices @param y y-coordinates of vertices @param default.units default unit type @param gp graphical parameters @param vp viewport to use @param name grob name @param draw whether to draw immediately (default TRUE) @return a polygon grob (invisibly)