Bug 92203 [Preferences] preferences package needs cleanup
org.eclipse.ui.preferences contains classes that should not be API by my estimation. These should be cleaned up before 3.1 ships.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/preferences/WizardPreferencesPage.java
*            the id of the button (see <code>IDialogConstants.*_ID</code>
     *            constants for standard dialog button ids)
     * @param label
     *            the label from the button
     * @param defaultButton
     *            <code>true</code> if the button is to be the default button,
     *            and <code>false</code> otherwise
     */
    protected Button createButton(Composite parent, int id, String label,
            boolean defaultButton) {
        
        ((GridLayout) parent.getLayout()).numColumns++;
        Button button = new Button(parent, SWT.PUSH);
        button.setFont(parent.getFont());
        GridData buttonData = new GridData(GridData.FILL_HORIZONTAL);
        button.setLayoutData(buttonData);
        button.setData(new Integer(id));
        button.setText(label);
        if (defaultButton) {
            Shell shell = parent.getShell();
            if (shell != null) {
                shell.setDefaultButton(button);
            }
            button.setFocus();
        }
        return button;
    }
    /**
     * Add the passed value to self's destination widget's history
     *