title: How to set filter option in QTableWidget
body: <p>In my application I have <code>QtableWidget</code> displaying multiple rows , line edit to enter string and push button, Requirement says upon clicking on push button Same <code>QTableWidget</code> should show only those rows which are having string entered into line edit.</p>
  
  <p>I thought of using <code>QSortFilterProxy</code> Model but <code>QTableWidget</code> is having <code>setModel(...)</code>method private so I am unable to use <code>QSortFilterProxy</code> Model in this case. Please  let me know how to implement Filter option in QTable Widget</p>