Bug 168888 [Wizards] PageTransition classes may need rename/reorg
bundles/org.eclipse.jface/src/org/eclipse/jface/wizard/WizardDialog.java
savedState.put(FOCUS_CONTROL, focusControl);
			}
            
            if (needsProgressMonitor) {
                progressMonitorPart.attachToCancelComponent(cancelButton);
                progressMonitorPart.setVisible(true);
            }
        }
        return savedState;
    }
    /**
     * The Back button has been pressed.
     */
    protected void backPressed() {
        IWizardPage page = currentPage.getPreviousPage();
        if (page == null) {
			
            return;
		}
        
        if (!doPageTransition(PageTransitionEvent.EVENT_BACK))
        	return;
        
        
        isMovingToPreviousPage = true;
        
        showPage(page);
    }
    /* (non-Javadoc)
     * Method declared on Dialog.