@Override
  public String toString() {
    return "StateOverride{"
        + "balance="
        + balance
        + ", nonce="
        + nonce
        + ", code="
        + code
        + ", state="
        + state
        + ", stateDiff="
        + stateDiff
        + ", movePrecompileToAddress="
        + movePrecompileToAddress
        + '}';
  }
utility method to log unknown properties

@param key key for the unrecognized value
@param value the unrecognized value
datatypes/src/main/java/org/hyperledger/besu/datatypes/StateOverride.java