Function interp_grid_lines 

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

Draw line segments (polyline) on the grid graphics device.

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