$v_{\rm 2}$ of electrons from $\pi^{0}$ Dalitz decays (red markers) and $v_{\rm 2}$ of $\pi^{0}$ (blue markers) as a function of $p_{\rm T}$ in the centrality class 10-20% in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV as obtained from the simulation used in the cocktail method. Only statistical errors are shown.