code: public static Url getCanonicalPageUrl(final Class<? extends Page> pageClass,
  		final PageParameters parameters)
  	{
  		return getPageUrl(pageClass, parameters).canonical();
  	}
docs: Gets the canonical page url. Try to reduce url by eliminating '..' and '.' from the path
  where appropriate (this is somehow similar to {@link java.io.File#getCanonicalPath()}).
  
  @param pageClass
  the page class
  @param parameters
  the parameters
  @return the page url
  @see Url#canonical()