private boolean hasDebugOrLower(final Configuration config) {
    for (LoggerConfig loggerConfig : config.getLoggers().values()) {
      boolean isDebugOrLower = loggerConfig.getLevel().isLessSpecificThan(Level.DEBUG);
      if (isDebugOrLower) {
        return true;
      }
    }
    return false;
  }
Name of variable that is set to "true" in log4j2.xml to indicate that it is the default geode
config xml.
geode-log4j/src/main/java/org/apache/geode/logging/log4j/internal/impl/Log4jLoggingProvider.java