local function _isDefined(s) 	return s ~= '' and s end  local p = {}  function p.IsRedirect(frame) 	local pagename = _isDefined( frame.args[1] ) 	return pagename and mw.title.new(pagename).isRedirect and 'yes' or '' end   function p.IsRedirectVal(value) 	return p.IsRedirect{args={value}} end  return p;