private void configureFastLoggerDelegating() {
    Configuration configuration = getConfiguration();
    FastLogger.setDelegating(hasContextWideFilter(configuration) || hasAppenderFilter(configuration)
        || hasDebugOrLower(configuration) || hasLoggerFilter(configuration)
        || hasAppenderRefFilter(configuration));
  }
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