Question about Ewald minimizer

[Juo-kim]

I have a POSCAR file of Na3Zr2Si2PO12 (mp-532695).

I'd like to substitute Zr2 -> HfZr at POSCAR file and get a minimum Ewald sum structure by using pymatgen.

So I tried to use Ewald minimizer, but I can't understand about the parameter of Ewald minimizer especially m_list.

Can I get a example of Ewald minimizer module? or more explain about the m_list at Ewald minimizer.