JEF distributions in \jetptrange{60}{80} for jet pairs with radii [0.05, 0.1], [0.1, 0.15], [0.15, 0.2], and [0.2, 0.25], in Pb--Pb collisions at $\sqrt{s_{\rm NN}} = 5.02 \mathrm{TeV}$. The lines represent the statistical uncertainties, and the boxes represent the systematic uncertainties.