+ def _read_persisted_macs_file(self, filename: str, location: Location) -> None:
+ """Internal method that, Given a filename that contains MAC addresses
+ seen on the network recently, reads it in and calls
+ _parse_raw_macs_file with the contents.
+
+ Args:
+ filename: The name of the file to read
+ location: The location we're reading from
+
+ """