Configuration implements LogConfigListener { @VisibleForTesting synchronized LogConfigSupplier getLogConfigSupplier() { return logConfigSupplier; } private  Configuration(final LogLevelUpdateOccurs logLevelUpdateOccurs,
      final LogLevelUpdateScope logLevelUpdateScope, final LoggingProvider loggingProvider); static Configuration create(); @VisibleForTesting static Configuration create(final LoggingProvider loggingProvider); @VisibleForTesting static Configuration create(final LogLevelUpdateOccurs logLevelUpdateOccurs,
      final LogLevelUpdateScope logLevelUpdateScope); @VisibleForTesting static Configuration create(final LogLevelUpdateOccurs logLevelUpdateOccurs,
      final LogLevelUpdateScope logLevelUpdateScope, final LoggingProvider loggingProvider); synchronized void initialize(final LogConfigSupplier logConfigSupplier); @Override synchronized void configChanged(); synchronized void shutdown(); @VisibleForTesting
  static final int DEFAULT_LOGWRITER_LEVEL; static final String STARTUP_CONFIGURATION; static final String CLI_CONFIG; static final String LOG_LEVEL_UPDATE_OCCURS_PROPERTY; }
@Test public void logConfigSupplierIsNullByDefault() { assertThat(configuration.getLogConfigSupplier()).isNull(); }