BarRenderer<D>  constructor 
      
      BarRenderer<D> ({ 
    
    
- BarRendererConfig<D> ? config,
- String? rendererId,
Implementation
factory BarRenderer({BarRendererConfig<D>? config, String? rendererId}) {
  rendererId ??= 'bar';
  config ??= BarRendererConfig();
  return BarRenderer.internal(config: config, rendererId: rendererId);
}