Log Handler
data class LogHandler(val platformSeverities: LogSeverityFlag = LogSeverityFlag.NONE, val callback: LogCallback)
A log callback, for setLogCallback().
Runs on the thread that logged the message, or on a background thread for the severities that setLogAsyncSeverityMask() selects. The callback can't call the library.
See mln_log_handler in the C API reference.