local function init_func(env)

       local config=env.engine.schema.config
   -- load ConfigList  form  path
       local proedit_fmt_list = conifg:get_list("translastor/preedit_format")
       -- print value
       for i=0,proedit_fmt_list.size do
               print(i,  proedit_fmt_list:get_value_at(i).value)
       end
       --   create Projection obj
       local p1=Projection()
       p1:load(proedit_fmt_list)

       --  user create  Projection obj
       local pfl2= ConfigList()
       -- create ConfigValue    &  ConfigList  ust isnert( index, ConfigValue)  append()
       local v1= ConfigValue("xlit|abc|xyz|")
       pfl2:append(v1)
       pfl2:append( ConfigValue("xlit|def|tuv|"))
       pfl2:insert(1,ConfigValue("xlit|ghi|qrs|"))
       local p2=Projection()
       p2:load(pfl2)
       local str1= "abcdefg"
       --
       print(str1 , p1:apply(str1), p2:apply(str1) )
       --
       env.p1=p1
       env.p2=p2
end
local function func(input,seg,env)
       for cand in input:iter() do
               cand.comment=  env.p1(cand.comment) .. env.p2(cand.comment)
               yield(cand)
       end
end


return { init=init_func, func=func }
---   rime.lua
--   projection_filter= require("projection.lua")
--
--
--   schema.yaml
--   insert to /engine/filter
--   lua_filter@projection_filter
--