Hanging Vines do not save its spawnpatch unlike Grabbing Vine

Hanging Vines do not save its spawnpatch unlike Grabbing Vine. The followings are missing code:

 

local function onsave(inst, data)
    local references = {}
      if inst.spawnpatch then 
          data.spawnpatch = inst.spawnpatch.GUID
          references = {data.leader}
      end
    return references
end

local function loadpostpass(inst,ents, data)
    if data then
        if data.spawnpatch then  
            local spawnpatch = ents[data.spawnpatch]
            if spawnpatch then
                inst.spawnpatch = spawnpatch.entity
            end
        end
    end
end