code: def attributes():
      
      attribute_classes = get_attribute_classes()
      for name, class_ in attribute_classes.items():
          click.echo(
              u'{name} - Added in: {ai} ({cv})'.format(
                  name=click.style(name, fg='green'),
                  ai=click.style(class_.ADDED_IN, fg='yellow'),
                  cv=click.style(
                      ClassVersion(*class_.MINIMUM_CLASS_VERSION).human,
                      fg='yellow'
                  )
              )
          )
docs: List enabled Attributes.
  
      Prints a list of all enabled ClassFile Attributes.