the way roboport receved bot are quite weird

[meifray]

inspired by https://mods.factorio.com/mod/Reusable_Robots

I want to make logistic robot have more limit,but I just got distracted by ending up have this small experiment:


in logistic-robot prototype,there`re no reference what robot item it should be when roboport receved them,except minable,
but when I set minable result into nil or other item,the roboport are still working fine,that is quite weird.

so I created other two item with place result set to "logistic-robot",and all three can be place,but roboport consistantly receved as one that are higherest in item group order,regardless its name in alphabet order.

is it useful? actually yes,if we add a item call "uncharged-logistic-robot" as minable result,then we just make player unable to cheat their battery!