As of v8.3.
log\info(MESSAGE, [CONTEXT])
Log a string MESSAGE with the INFO level. An optional CONTEXT should be an object.
log\notice(MESSAGE, [CONTEXT])
Log a string MESSAGE with the NOTICE level. An optional CONTEXT should be an object.
log\warning(MESSAGE, [CONTEXT])
Log a string MESSAGE with the WARNING level. An optional CONTEXT should be an object.
log\error(MESSAGE, [CONTEXT])
Log a string MESSAGE with the ERROR level. An optional CONTEXT should be an object.