Can anyone tell me who this is? The local lawn & garden center had a few, and two different employees told me two different things. One thought it was a kind of Cordyline and the other confidently said it was "three-striped Dracaena". I've googled, but can't find an image matching this plant. It's currently about 28 inches tall, and the leaves are about 8 inches long and 1.5 inches wide. Mostly green with some faint gray and white/pink/red striping. Thanks for any help!