Bug 168888 [Wizards] PageTransition classes may need rename/reorg
bundles/org.eclipse.jface/src/org/eclipse/jface/wizard/WizardDialog.java
/**
     * Creates the Previous and Next buttons for this wizard dialog.
     * Creates standard (<code>SWT.PUSH</code>) buttons and registers for their
     * selection events. Note that the number of columns in the button bar composite
     * is incremented. These buttons are created specially to prevent any space 
     * between them.
     *
     * @param parent the parent button bar
     * @return a composite containing the new buttons
     */
    private Composite createPreviousAndNextButtons(Composite parent) {
        
        ((GridLayout) parent.getLayout()).numColumns++;
        Composite composite = new Composite(parent, SWT.NONE);
        
        GridLayout layout = new GridLayout();
        layout.numColumns = 0; 
        layout.marginWidth = 0;
        layout.marginHeight = 0;
        layout.horizontalSpacing = 0;
        layout.verticalSpacing = 0;
        composite.setLayout(layout);
        GridData data = new GridData(GridData.HORIZONTAL_ALIGN_CENTER
                | GridData.VERTICAL_ALIGN_CENTER);
        composite.setLayoutData(data);
        composite.setFont(parent.getFont());
        backButton = createButton(composite, IDialogConstants.BACK_ID,
                IDialogConstants.BACK_LABEL, false);
        nextButton = createButton(composite, IDialogConstants.NEXT_ID,
                IDialogConstants.NEXT_LABEL, false);