@Override
			protected void updateItem(T item, boolean empty) {
				super.updateItem(item, empty);
				if (empty || item == null) {
					setText(null);
					setGraphic(null);
				} else {
					setText(textifier.toText(item));
					setGraphic(graphifier.toGraphic(item));
				}
			}
@param config
		Tab completion config.
@param cellSize
		Height of cells in the list-view of completion items.
@param textifier
		Mapper of {@code T} values to {@code String}.
@param graphifier
		Mapper of {@code T} values to display graphics.
recaf-ui/src/main/java/software/coley/recaf/ui/control/richtext/suggest/CompletionPopup.java