Reading and Writing from local files and directories @filename: @err: @Returns: @filename: @file: @keep_open: @Returns: @filename: @err: @Returns: @filename: @err: @first_property_name: @Varargs: @Returns: @filename: @err: @first_property_name: @var_args: @Returns: @filename: @file: @keep_open: @Returns: @root: @err: @Returns: @root: @err: @first_property_name: @Varargs: @Returns: @root: @err: @first_property_name: @var_args: @Returns: @root: @err: @Returns: