To aid with logging, Alchemy provides a lightweight wrapper on top of SwiftLog. You can conveniently log to the various levels via static functions on the Log struct. 
Log.trace("Here")
Log.debug("Testing")
Log.info("Hello")
Log.notice("FYI")
Log.warning("Hmmm")
Log.error("Uh oh")
Log.critical("Houston, we have a problem")
These log to Log.logger, an instance of SwiftLog.Logger, which defaults to a basic stdout logger.

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Configuring Custom Loggers

Log.logger is a settable variable so you may set it to be a more complex Logger that outputs to wherever you need it to go. See SwiftLog for advanced usage and available log drivers.