Is _windowSize UNIX time or seconds?

[kangaroosterus]

https://github.com/aparnakr/OptionsProtocol/blob/9363067b23278cd6d919cc0dad8ae0d4b489491f/contracts/OptionsFactory.sol#L48

There seems to be an inconsistency with the comment here and wanted to make sure that it's not an issue in other parts of the code (which I haven't reviewed yet) that calculate the exercise window.

If _windowSize is a UNIX time, then does it mean that the the window is actually: FROM [_windowSize] to [expiry]?

More likely, _windowSize is number of seconds from expiry...