local clear = require("table.opt.clear")
local caches = require("optimize.cache")
---数据变更
local change = {}
---事务提交
---@param chgs table|nil @修改
---@return table @返回修改记录
return function(chgs)
 if not chgs then
 chgs = clear(change)
 for t, ret in pairs(caches) do
 local met = getmetatable(ret)
 local chg = met.__newindex ---记录修改
 local ori = met.__index ---原始数据
 local emt = met.__empty ---忽略数据
 for k, v in pairs(chg) do

 ---值一样删除记录
 if ori[k] == v then
 chg[k] = nil
 end

 if v ~= emt then
 ori[k] = v
 else
 ---删除视同nil的子弹
 ori[k] = nil
 end
 end
 caches[t] = nil
 change[t] = chg
 end
 end
 return chgs
end