title: Can we add custom validation to Editor Part Property?
body: <p>I have Appearance Editor Part in my application. I have an requirement like i have to include a custom validation like required field validation to the Title Property of Appearance Editor Part. How to include this?</p>
  
  <p>I found many answers to change to custom web part rather than Appearance Editor Part. But in my project , i cannot do this. I want to include custom validator to the title property of Appearance Editor part alone. </p>