private static ChainResources supplyOutdatedForkResources() {
    final URL genesisURL =
        ensureFileUrl(
            BlockTestUtil.class
                .getClassLoader()
                .getResource("fork-chain-data/genesis-outdated.json"));
    final URL blocksURL =
        ensureFileUrl(
            BlockTestUtil.class
                .getClassLoader()
                .getResource("fork-chain-data/fork-outdated.blocks"));
    return new ChainResources(genesisURL, blocksURL);
  }
Gets test chain resources for Snap tests.

@return the test chain resources
testutil/src/main/java/org/hyperledger/besu/testutil/BlockTestUtil.java