Results 12 issues of Fabian Cañas

I think this warrants creating an event space protocol. see #2

For easier use with document classification

Another discrete model. see #3

Modeling a continuous event space requires a new event model. I think this warrants creating an event space protocol.

swift-argument-parser 0.4.0 and up didn't seem to introduce any changes that break XCLogParser. Though I'm not sure how extensive and reliable the tests are, both `swift build` and `swift test`...

enhancement
core