@Override
	public void handle(@Nonnull KeyEvent event) {
		// Ensure directional / input keys are sent to the popup.
		KeyCode code = event.getCode();
		boolean move = code == UP || code == DOWN;
		if (completionPopup.isShowing() && move)
			completionPopup.requestFocus();
	}
@param completionPopup
		Popup to send focus events to.
recaf-ui/src/main/java/software/coley/recaf/ui/control/richtext/suggest/CompletionPopupFocuser.java