code: public <T> PagedList<T> fetchPreviousPagedConnections(PagedList<T> page, Class<T> type) {
  		if (null != page && null != page.getPreviousPage() && !"".equals(page.getPreviousPage().getFullUrl().trim())) {
  			URIBuilder uriBuilder = URIBuilder.fromUri(page.getPreviousPage().getFullUrl());
  			JsonNode jsonNode = getRestTemplate().getForObject(uriBuilder.build(), JsonNode.class);
  			return pagify(type, jsonNode);
  		}
  		return null;
  	}
docs: Fetchs the previous {@link org.springframework.social.facebook.api.PagedList PagedList} of the current one.
  @param page source {@link org.springframework.social.facebook.api.PagedList PagedList} to fetch the previous one.
  @param type type of the source {@link org.springframework.social.facebook.api.PagedList PagedList} and the previous one.
  @return the previous {@link org.springframework.social.facebook.api.PagedList PagedList} of the given one.
  @param <T> the type of the source
  It returns <code>null</code> if the previous {@link org.springframework.social.facebook.api.PagedList PagedList} doesn't exist.