@Override
  public Account get(final Address address) {
    // We may have updated it already, so check that first.
    final MutableAccount existing = updatedAccounts.get(address);
    if (existing != null) {
      return existing;
    }
    if (deletedAccounts.contains(address)) {
      return null;
    }
    return getForMutation(address);
  }
Track update tracking account.

@param account the account
@return the update tracking account
evm/src/main/java/org/hyperledger/besu/evm/worldstate/AbstractWorldUpdater.java