The spec for this action:
https://www.adobe.com/content/dam/acom/en/devnet/pdf/pdfs/PDF32000_2008.pdf#G11.2111850
An example of a form using this action:
https://www2.illinois.gov/rev/forms/reg/Documents/reg-1-mr.pdf
if (isValid) {
              prefValue = value;
            }
            break;
          case "NumCopies":
            if (value > 0) {
              prefValue = value;
            }
            break;
          default:
            if (typeof value !== "boolean") {
              throw new FormatError(
                `viewerPreferences - expected a boolean value for: ${key}`
              );
            }
            prefValue = value;
        }
        if (prefValue !== undefined) {
          if (!prefs) {
            prefs = Object.create(null);
          }
          prefs[key] = prefValue;
        } else {
          info(`Bad value in ViewerPreferences for "${key}".`);
        }
      }
    }
    return shadow(this, "viewerPreferences", prefs);
  }
  get openAction() {