code: public BuilderType setOnShowListener(@Nullable final DialogInterface.OnShowListener listener) {
          getProduct().setOnShowListener(listener);
          return self();
      }
docs: Sets the listener, which should be notified, when the dialog has been shown.
  
  @param listener
  The listener, which should be set, as an instance of the type {@link
  DialogInterface.OnShowListener}, or null, if no listener should be set