docs: @Nonnull
      public ParametersAction merge(@CheckForNull ParametersAction overrides) {
          if (overrides == null) {
              return new ParametersAction(parameters, this.safeParameters);
          }
          ParametersAction parametersAction = createUpdated(overrides.parameters);
          Set<String> safe = new TreeSet<>();
          if (parametersAction.safeParameters != null && this.safeParameters != null) {
              safe.addAll(this.safeParameters);
          }
          if (overrides.safeParameters != null) {
              safe.addAll(overrides.safeParameters);
          }
          parametersAction.safeParameters = safe;
          return parametersAction;
      }