Detector-level Pb--Pb distributions of \zg for $R=0.4$ jets with varying minimum/maximum angular separation of subjets ($\DeltaR$) for jets in the range 80 $\leq \pTjetch < $ 120\, GeV/$c$. The systematic uncertainties are represented by the shaded area. The corresponding values for the embedded PYTHIA reference (open symbols), Hybrid model (dashed line) and JEWEL (solid line) are also shown in the plot. The lower plots show the ratios of data, Hybrid and JEWEL model to the embedded PYTHIA reference.