Bug 38092 build configuration view instantiation problem
after invoking build configuration view, an error popup window displayed this message : "Unable to instantiate view : org.eclipse.cd.ui.builder.internal.BuildConfigView Reason : Unable to instantiate view : org.eclipse.cd.ui.builder.internal.BuildConfigView"
bundles/org.eclipse.jface/src/org/eclipse/jface/wizard/Wizard.java
* Method declared on IWizard.
 */
public int getPageCount() {
	return pages.size();
}
/* (non-Javadoc)
 * Method declared on IWizard.
 */
public IWizardPage[] getPages() {
	return (IWizardPage[])pages.toArray(new IWizardPage[pages.size()]);
}
/* (non-Javadoc)
 * Method declared on IWizard.
 * The default behavior is to return the page that 
 * was added to this wizard before the given page.
 */
public IWizardPage getPreviousPage(IWizardPage page) {
	int index = pages.indexOf(page);
	if (index == 0 || index == -1)
		
		return null;
	else
		return (IWizardPage)pages.get(index - 1);
}
/**
 * Returns the wizard's shell if the wizard is visible. Otherwise
 * <code>null</code> is returned.
 */
public Shell getShell() {
	if (container == null)