@Override
  public boolean equals(Object o) {
    if (!(o instanceof PrfBasedKeyDerivationParameters)) {
      return false;
    }
    PrfBasedKeyDerivationParameters that = (PrfBasedKeyDerivationParameters) o;
    return that.getPrfParameters().equals(getPrfParameters())
        && that.getDerivedKeyParameters().equals(getDerivedKeyParameters());
  }
The parameters of the keys which are in the result keyset when the user calls {@code
KeysetDeriver.deriveKeyset()}.
java_src/src/main/java/com/google/crypto/tink/keyderivation/PrfBasedKeyDerivationParameters.java