public String[] getRequiredClasses() {
    if (myRequiredClasses == null) return ArrayUtilRt.EMPTY_STRING_ARRAY;

    final List<String> classes = ContainerUtil.mapNotNull(myRequiredClasses, requiredClass -> requiredClass.getFqn());

    return ArrayUtilRt.toStringArray(classes);
  }
public String[] getRequiredClasses()