You are helping a team that maintains a popular data visualization library. The library currently requires…

You are helping a team that maintains a popular data visualization library. The library currently requires…: a task in LegoFlow-SWE (Harbor dataset). df = pl.DataFrame({'source': 'a', 'b', 'c' , 'counts': 10, 20, 30 }) plot = so.Plot(df, x='source', y='counts').add(so.Bar())