public Iterable<JComponent> getWrappedFragmentsIterable() {
    return new Iterable<>() {
      @Override
      public @NotNull Iterator<JComponent> iterator() {
        Iterable<JComponent> components = JBIterable.<Fragment>empty()
          .append(myPrimaryColumn.fragments)
          .append(mySecondaryColumn.fragments)
          .map(it -> it.myComponent);

        return components.iterator();
      }
    };
  }
public Iterable<JComponent> getWrappedFragmentsIterable()