Register a callback function that will receive logging event information. An absent callback will unregister an existing callback function. The log level defaults to INFO, it can be set to one of ERROR, WARN, INFO, DEBUG, or TRACE.
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Register a callback function that will receive logging event information. An absent callback will unregister an existing callback function. The log level defaults to INFO, it can be set to one of ERROR, WARN, INFO, DEBUG, or TRACE.