do not register CbmQaCanvas in the global list of canvases
Unregister CbmQaCanvas from the global list of gROOT canvases after construction. It protects the canvas from an automatic deletion when another canvas with the same name is created.
Unregister CbmQaCanvas from the global list of gROOT canvases after construction. It protects the canvas from an automatic deletion when another canvas with the same name is created.