Class description at the top says:
The `prototypes.item["iron-plate"]` is correct, but the `LuaGameScript::item_prototypes` is a leftover from the previous version, and the link leads to property that no longer exists. It should probably be replaced with a link to `LuaPrototypes::item`.Prototype of an item. For example, an item prototype can be obtained from LuaGameScript::item_prototypes by its name: prototypes.item["iron-plate"].
