title: How to disable specific QML debugger warning
body: <p>I don't want to disable all warnings from QML (<a href="https://stackoverflow.com/questions/37996105/qt-hide-qml-debugging-warning">as asked in this question</a>). Instead I want to disable a specific type of warning. In my case the <code>TypeError: Cannot read property of null</code> warning.</p>
  
  <p>Note that I am getting this warning as a result of a <a href="https://bugreports.qt.io/browse/QTBUG-57650" rel="nofollow noreferrer">Qt bug that affects grandchildren elements during their destruction</a>, not as a result of any code errors, I believe. In my case, I get lots of these warnings (10s to 100s) each time a particular <code>GridView</code> model is changed, so these messages are dominating the console log.</p>