def METHOD_NAME(self, conf: ConfigTree) -> None:
    """
    Initializing FsAtlasCSVLoader by creating directory for entity files
    and relationship files. Note that the directory defined in
    configuration should not exist.
    :param conf:
    :return:
    """
    conf = conf.with_fallback(FsAtlasCSVLoader._DEFAULT_CONFIG)
    self._entity_dir = conf.get_string(FsAtlasCSVLoader.ENTITY_DIR_PATH)
    self._relation_dir = \
        conf.get_string(FsAtlasCSVLoader.RELATIONSHIP_DIR_PATH)
    self._delete_created_dir = \
        conf.get_bool(FsAtlasCSVLoader.SHOULD_DELETE_CREATED_DIR)
    self._force_create_dir = conf.get_bool(FsAtlasCSVLoader.FORCE_CREATE_DIR)
    self._create_directory(self._entity_dir)
    self._create_directory(self._relation_dir)