private static Bytes processTargetCode(
      final WorldUpdater worldUpdater,
      final Predicate<Address> isPrecompile,
      final Address targetAddress) {
    if (targetAddress == null) {
      return Bytes.EMPTY;
    }

    final Account targetAccount = worldUpdater.get(targetAddress);

    if (targetAccount == null || isPrecompile.test(targetAddress)) {
      return Bytes.EMPTY;
    }
    return targetAccount.getCode();
  }
Returns the target account of the delegated code.

@param worldUpdater the world updater.
@param isPrecompile function to check if an address belongs to a precompile account.
@param account the account which has a code delegation.
@return the target account of the delegated code, throws IllegalArgumentException if account is
    null or doesn't have code delegation.
evm/src/main/java/org/hyperledger/besu/evm/worldstate/CodeDelegationHelper.java