changing the order in which elements are destroyed in the destructor
changing the order in which elements are destroyed in the destructor

ChakriCherukuri/bqplot,dmadeka/bqplot,ssunkara1/bqplot,bloomberg/bqplot,rmenegaux/bqplot,SylvainCorlay/bqplot,SylvainCorlay/bqplot,rmenegaux/bqplot,bloomberg/bqplot,dmadeka/bqplot,ssunkara1/bqplot,bloomberg/bqplot,ChakriCherukuri/bqplot,ChakriCherukuri/bqplot,SylvainCorlay/bqplot