code: def reset ():
      
      global __prefixes_suffixes, __suffixes_to_types, __types, __rule_names_to_types, __target_suffixes_cache
  
      __register_features ()
  
      # Stores suffixes for generated targets.
      __prefixes_suffixes = [property.PropertyMap(), property.PropertyMap()]
  
      # Maps suffixes to types
      __suffixes_to_types = {}
  
      # A map with all the registered types, indexed by the type name
      # Each entry is a dictionary with following values:
      # 'base': the name of base type or None if type has no base
      # 'derived': a list of names of type which derive from this one
      # 'scanner': the scanner class registered for this type, if any
      __types = {}
  
      # Caches suffixes for targets with certain properties.
      __target_suffixes_cache = {}
docs: Clear the module state. This is mainly for testing purposes.
          Note that this must be called _after_ resetting the module 'feature'.