@BeforeEach
  public void resetLoggingToOriginalConfiguration() {
    if (originalRootLogLevel == null) {
      System.clearProperty("root.log.level");
    } else {
      System.setProperty("root.log.level", originalRootLogLevel);
    }
    if (originalEvmLogLevel == null) {
      System.clearProperty("evm.log.level");
    } else {
      System.setProperty("evm.log.level", originalEvmLogLevel);
    }
    resetLogging();
  }
Sets the logging system back to the original parameters with which the tests were launched.
ethereum/core/src/test/java/org/hyperledger/besu/ethereum/vm/AbstractRetryingTest.java