Customizing Widget Title bar

Hi, 

I am looking for the place where I could override the   rendering of widgets title.

 

At the moment, by default, the title bar contains

  • Widget Title, 
  • Edit menu, 
  • Minimize/Maximize 
  • Close button 

I would like to entirely change this (using 3rd party component) and am looking for the way to override this.

Thanks ,

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jaguarg