$R$ and $\lambda$ parameters extracted in the present analysis from K$^0_{\rm S}$K$^{\rm \pm}$ femtoscopy averaged over K$^0_{\rm S}$K$^+$ and K$^0_{\rm S}$K$^-$, along witha comparison with K$^0_{\rm S}$K$^{\rm \pm}$ results from ALICE 2.76 TeV Pb-Pb collisions for $0-10$\% centrality  The quadratic sum of the statistical and systematic uncertainties is plotted for all results as boxes andthe statistical uncertainties are given as lines. The $\lambda$ parameters have been dividedby their respective pair purities to facilitate their comparison.