@Test
  public void assertPoWDetachedHeaderValidationPreMerge() {
    BlockHeaderValidator powValidator =
        MainnetBlockHeaderValidator.createBaseFeeMarketValidator(FeeMarket.london(1L), true)
            .build();
    assertDetachedRulesForPostMergeBlocks(powValidator);
  }
We only bother testing transitionControllerBuilder for PoW and Clique since those are the only
network types that are transitioning to PoS.
app/src/test/java/org/hyperledger/besu/controller/TransitionControllerBuilderTest.java