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
const hasRan = this.runActions(source, source, event, "Validate");
    if (event.rc) {
      if (hasRan) {
        source.wrapped.value = event.value;
        source.wrapped.valueAsString = event.value;
      } else {
        source.obj.value = event.value;
        source.obj.valueAsString = event.value;
      }
      if (this._document.obj.calculate) {
        this.runCalculate(source, event);
      }
      event.value = source.obj.value;
      this.runActions(source, source, event, "Format");
      source.wrapped.valueAsString = event.value;
    }
  }
  runActions(source, target, event, eventName) {