Normalized second order cumulant of net-$\Xi$ (left panel) and correlation between net-$\Xi$ and net-kaon (right panel), as a function of the average multiplicity at midrapidity, in pp (red squares), p--Pb (green diamonds), and Pb--Pb collisions (blue circles) at $\sqrt{s_{\mathrm{NN}}}=5.02\ \mathrm{TeV}$. Statistical and systematic uncertainties are shown via error bars and boxes, respectively. The experimental measurements are compared to several model predictions, shown as bands. The width of the bands represents the statistical uncertainty of the predictions. The average multiplicity values are obtained from~Refs.~: their uncertainties are not shown in the plot.