input= OpenActionUtil.selectJavaElement(candidates, window.getShell(), title, message);
input= SelectionConverter.selectJavaElement(candidates, window.getShell(), title, message);
    public static CallHierarchyViewPart open(IJavaElement[] candidates, IWorkbenchWindow window) {        Assert.isTrue(candidates != null && candidates.length != 0);                    IJavaElement input= null;        if (candidates.length > 1) {            String title= CallHierarchyMessages.CallHierarchyUI_selectionDialog_title;              String message= CallHierarchyMessages.CallHierarchyUI_selectionDialog_message;             input= OpenActionUtil.selectJavaElement(candidates, window.getShell(), title, message);                 } else {            input= candidates[0];        }        if (input == null)            return null;                    return openInViewPart(window, input);    }