Mod already uses those for e.g. input tables, which I think is likely where such methods will be used first, with various confusing results.
So should probably be either wrapped to avoid that, or maybe hidden from common use somewhere.
You can also add these methods to sandbox_env_base table in control.lua to expose in a local mod version, but yeah, they're only not there because weren't in this mod's predecessor, and no one cared to mention them before, I think.