      /**
       * The constants used in this Content Widget.
       */
      public static interface CwConstants extends Constants,
          ContentWidget.CwConstants {
        String cwConstantsWithLookupExampleDescription();

        String cwConstantsWithLookupExampleLinkText();

        String cwConstantsWithLookupExampleMethodName();

        String cwConstantsWithLookupExampleName();

        String cwConstantsWithLookupExampleNoInput();

        String cwConstantsWithLookupExampleNoMatches();

        String cwConstantsWithLookupExampleResults();
      }

      /**
       * A {@link TextBox} where the user can select a color to lookup.
       */
      private TextBox colorBox = null;

      /**
       * A {@link TextBox} where the results of the lookup are displayed.
       */
      private TextBox colorResultsBox = null;

      /**
       * An instance of the constants.
       */
      private CwConstants constants;

      /**
       * Initialize this example.
       */
      @Override
      public Widget onInitialize() {
        // Create the internationalized constants
        colorConstants = GWT.create(ColorConstants.class);

        // Use a FlexTable to layout the content
        FlexTable layout = new FlexTable();
        FlexCellFormatter formatter = layout.getFlexCellFormatter();
        layout.setCellSpacing(5);

        // Add a link to the source code of the Interface
        HTML link = new HTML(" <a href=\"javascript:void(0);\">ColorConstants</a>");
        link.addClickHandler(new ClickHandler() {
          public void onClick(ClickEvent event) {
            selectTab(2);
          }
        });
        HorizontalPanel linkPanel = new HorizontalPanel();
        linkPanel.setSpacing(3);
        linkPanel.add(new HTML(constants.cwConstantsWithLookupExampleLinkText()));
        linkPanel.add(link);
        layout.setWidget(0, 0, linkPanel);
        formatter.setColSpan(0, 0, 2);

        // Add a field so the user can type a color
        colorBox = new TextBox();
        colorBox.setText("red");
        colorBox.setWidth("17em");
        layout.setHTML(1, 0, constants.cwConstantsWithLookupExampleMethodName());
        layout.setWidget(1, 1, colorBox);

        // Show the last name
        colorResultsBox = new TextBox();
        colorResultsBox.setEnabled(false);
        colorResultsBox.setWidth("17em");
        layout.setHTML(2, 0, constants.cwConstantsWithLookupExampleResults());
        layout.setWidget(2, 1, colorResultsBox);

        // Add a handler to update the color as the user types a lookup value
        colorBox.addKeyUpHandler(new KeyUpHandler() {
          public void onKeyUp(KeyUpEvent event) {
            updateColor();
          }
        });

        // Return the layout Widget
        updateColor();
        return layout;
      }

      /**
       * Lookup the color based on the value the user entered.
       */
      private void updateColor() {
        String key = colorBox.getText().trim();
        if (key.equals("")) {
          colorResultsBox.setText(constants.cwConstantsWithLookupExampleNoInput());
        } else {
          try {
            String color = colorConstants.getString(key);
            colorResultsBox.setText(color);
          } catch (MissingResourceException e) {
            colorResultsBox.setText(constants.cwConstantsWithLookupExampleNoMatches());
          }
        }
      }