The Logger API is used to save logging messages from the host applications to the run.log file. The host application can set the log level of which messages are written to the run.log and which messages are shown on the console during execution. By default, the log level is set to LMESSAGE, meaning all messages will be written to run.log. The cout log level is set to LINFO, meaning any messages set to LINFO will be also displayed on the output console during execution.