The 'identity of interest' method of imputing Rule 15(c)(3) notice to a newly named party is closely related to the shared attorney method. Identity of interest is explained by one commentator as follows: 'Identity of interest generally means that the parties are so closely related in their business operations or other activities that the institution of an action against one serves to provide notice of the litigation to the other.' 6A Charles A. Wright et al., Federal Practice And Procedure S 1499, at 146 (2d ed. 1990). One could view the shared attorney method as simply a special case of, or as providing evidence for, the identity of interest method, in that sharing an attorney with an originally named party demonstrates that you share an identity of interest with that party. See, e.g., Jacobsen v. Osborne, 133 F.3d 315, 320 (5th Cir. 1998) (using the fact that the parties shared an attorney as evidence that the identity of interest test was met). But cf. 3 James Wm. Moore, Moore's Federal Practice S 15.19[3][c], at 15-88 to 15-89 (3d ed. 2001) ('Legal counsel shared by the original and new defendants is not sufficient to establish an identity of ...