Bug 168888 [Wizards] PageTransition classes may need rename/reorg
bundles/org.eclipse.jface/src/org/eclipse/jface/wizard/WizardDialog.java
createdWizards.add(wizard);
            
            nestedWizards.add(wizard);
            if (pageContainer != null) {
                	
                
                
                createPageControls();
                
                updateSizeForWizard(wizard);
                pageContainer.layout(true);
            }
        } else {
            
             
            
            int size = nestedWizards.size();
            if (size >= 2 && nestedWizards.get(size - 2) == wizard) {
				nestedWizards.remove(size - 1);
			} else {
				
                nestedWizards.add(wizard);
			}
        }
    }
    /* (non-Javadoc)
     * Method declared on IWizardContainer.
     */
    public void showPage(IWizardPage page) {
        if (page == null || page == currentPage) {