In Pennsylvania, it is quite well-established that Pa. R.A.P. 313 allows immediate appeal of otherwise interlocutory decisions as "collateral orders" where a question of privilege is involved. See Commonwealth v. Harris, 32 A.3d 243, 249 (Pa. 2011) (once privileged material is disclosed, "the bell cannot be unrung by a later appeal"). In privilege cases, Rule 313(b)'s three-pronged test for appealability: a severable issue, an important right, and irreparable harm of review is postponed—is easily met.