def logtrace(logger, msg, *args, **kwargs):
    '''
    If esgfpid.defaults.LOG_TRACE_TO_DEBUG, messages are treated
    like debug messages (with an added [trace]).
    Otherwise, they are ignored.
    '''
    if esgfpid.defaults.LOG_TRACE_TO_DEBUG:
        logdebug(logger, '[trace] %s' % msg, *args, **kwargs)
    else:
        pass