code: def is_default(name=None, index=None):
      
  
      if not is_configured():
          raise JutException('No configurations available, please run `jut config add`')
  
      count = 1
      for configuration in _CONFIG.sections():
  
          if index != None:
              if _CONFIG.has_option(configuration, 'default') and count == index:
                  return True
  
          if name != None:
              if _CONFIG.has_option(configuration, 'default') and configuration == name:
                  return True
  
          count += 1
  
      return False
docs: returns True if the specified configuration is the default one