@Override
  public void setBalance(final Wei value) {
    if (immutable) {
      throw new ModificationNotAllowedException();
    }
    this.balance = value;
  }
A map of the storage entries that were modified.

@return a map containing all entries that have been modified. This <b>may</b> contain entries
    with a value of 0 to signify deletion.
evm/src/main/java/org/hyperledger/besu/evm/worldstate/UpdateTrackingAccount.java