title: why i need to use init() and cursor() in luci program
body: <p>In my cbi files I have:</p>
  
  <pre><code>local t=require"luci.model.network".init()
  local e=require"luci.model.firewall".init()
  local i=require"luci.util"
  local e=require"luci.model.uci".cursor()
  </code></pre>
  
  <p>In the above syntax if i remove <strong>init()</strong> and <strong>cursor()</strong> then my program not work properly,need help why it's necessary </p>
  
  <p>From where i can learn about init(),cursor() in luci and why they are necessary?</p>