Best way to get a request object from a pageContext object while using Taghandlers.

Which is the correct way to get a slingRequest from a pageContext object in Tag Handlers. Will it give same result always?

        SlingHttpServletRequest slingRequest1 = TagUtil.getRequest(pageContext);
        SlingHttpServletRequest slingRequest2 = (SlingHttpServletRequest) pageContext.getRequest();
        SlingHttpServletRequest slingRequest3 = (SlingHttpServletRequest)pageContext.getAttribute("slingRequest");