minetest.env = {}
setmetatable(minetest.env, {
        __index = function(table, key)
                local func = minetest[key]
                if type(func) == 'function' then
                        rawset(table, key, function(self, ...)
                                return func(unpack(arg))
                        end)
                else
                        rawset(table, key, nil)
                end
                return rawget(table, key)
        end
})