discussed Cited "see" Taco Cabana International, Inc. v. Two Pesos, Inc. See Freddie Fuddruckers, Inc. v. Ridgeline, Inc., 589 F.Supp. 72, 77 (N.D.Tex.1984) (policy predicate for functionality doctrine is public interest in enhancing competition), aff'd without op., 783 F.2d 1062 (5th Cir.1986); Stormy Clime Ltd. v. ProGroup, Inc., 809 F.2d 971, 977-78 (2d Cir.1987) (functionality test critical to avoid upsetting patent law by indefinitely extending trade dress protection to an aggregation of elements that would otherwise enrich the public domain after expiration of design patent).