\ \ipqcd\ for central \PbPb collisions at \snnfive measured in ALICE for isolated-prompt $\gamma$--hadron correlations, and \iaa\ measured in CMS for isolated-prompt $\gamma$--jet correlations  and \zz--hadron correlations  also in central collisions. The boxes and vertical lines represent the systematic and statistical uncertainties, respectively. For ALICE, the blue-open boxes represent the $\mu$ scale uncertainty for the denominator NLO pQCD calculation for \pp collisions.