I use log.warn() a lot to printout traces during development of scripts. Its very handy to be able to print objects or other variables directly with log.warn(). However the insight groovy engine seems to require that I add "toString()" on all things I pass to log.warn(). Compared to scriptrunner this is not required.  Please add an default toString() method in log.warn() to save us a lot of time during scripting.