ENH: If already empty, do not delete and set it to 0 after deleting so that you can create new one.
ENH: If already empty, do not delete and set it to 0 after deleting so that you can create new one.

candy7393/VTK,cjh1/VTK,spthaolt/VTK,sgh/vtk,candy7393/VTK,sankhesh/VTK,sankhesh/VTK,candy7393/VTK,gram526/VTK,sankhesh/VTK,Wuteyan/VTK,sumedhasingla/VTK,SimVascular/VTK,johnkit/vtk-dev,Wuteyan/VTK,ashray/VTK-EVM,sumedhasingla/VTK,mspark93/VTK,keithroe/vtkoptix,mspark93/VTK,candy7393/VTK,spthaolt/VTK,msmolens/VTK,SimVascular/VTK,hendradarwin/VTK,collects/VTK,naucoin/VTKSlicerWidgets,jmerkow/VTK,daviddoria/PointGraphsPhase1,arnaudgelas/VTK,berendkleinhaneveld/VTK,mspark93/VTK,johnkit/vtk-dev,naucoin/VTKSlicerWidgets,jeffbaumes/jeffbaumes-vtk,collects/VTK,sumedhasingla/VTK,sankhesh/VTK,berendkleinhaneveld/VTK,msmolens/VTK,aashish24/VTK-old,sankhesh/VTK,berendkleinhaneveld/VTK,SimVascular/VTK,biddisco/VTK,berendkleinhaneveld/VTK,sgh/vtk,demarle/VTK,collects/VTK,mspark93/VTK,biddisco/VTK,collects/VTK,demarle/VTK,daviddoria/PointGraphsPhase1,cjh1/VTK,keithroe/vtkoptix,sankhesh/VTK,ashray/VTK-EVM,Wuteyan/VTK,jmerkow/VTK,biddisco/VTK,ashray/VTK-EVM,johnkit/vtk-dev,sgh/vtk,sankhesh/VTK,candy7393/VTK,demarle/VTK,keithroe/vtkoptix,hendradarwin/VTK,hendradarwin/VTK,demarle/VTK,keithroe/vtkoptix,arnaudgelas/VTK,mspark93/VTK,spthaolt/VTK,collects/VTK,hendradarwin/VTK,gram526/VTK,gram526/VTK,Wuteyan/VTK,gram526/VTK,keithroe/vtkoptix,gram526/VTK,hendradarwin/VTK,demarle/VTK,daviddoria/PointGraphsPhase1,cjh1/VTK,biddisco/VTK,spthaolt/VTK,ashray/VTK-EVM,arnaudgelas/VTK,SimVascular/VTK,aashish24/VTK-old,SimVascular/VTK,Wuteyan/VTK,ashray/VTK-EVM,candy7393/VTK,sgh/vtk,hendradarwin/VTK,SimVascular/VTK,sankhesh/VTK,arnaudgelas/VTK,aashish24/VTK-old,keithroe/vtkoptix,naucoin/VTKSlicerWidgets,daviddoria/PointGraphsPhase1,sumedhasingla/VTK,johnkit/vtk-dev,jeffbaumes/jeffbaumes-vtk,jeffbaumes/jeffbaumes-vtk,sgh/vtk,jmerkow/VTK,cjh1/VTK,spthaolt/VTK,gram526/VTK,berendkleinhaneveld/VTK,hendradarwin/VTK,mspark93/VTK,ashray/VTK-EVM,msmolens/VTK,candy7393/VTK,SimVascular/VTK,naucoin/VTKSlicerWidgets,daviddoria/PointGraphsPhase1,Wuteyan/VTK,sumedhasingla/VTK,keithroe/vtkoptix,demarle/VTK,berendkleinhaneveld/VTK,candy7393/VTK,spthaolt/VTK,sgh/vtk,msmolens/VTK,jmerkow/VTK,jmerkow/VTK,ashray/VTK-EVM,sumedhasingla/VTK,jeffbaumes/jeffbaumes-vtk,msmolens/VTK,jmerkow/VTK,jmerkow/VTK,johnkit/vtk-dev,aashish24/VTK-old,sumedhasingla/VTK,mspark93/VTK,ashray/VTK-EVM,msmolens/VTK,biddisco/VTK,collects/VTK,msmolens/VTK,aashish24/VTK-old,berendkleinhaneveld/VTK,naucoin/VTKSlicerWidgets,demarle/VTK,biddisco/VTK,SimVascular/VTK,mspark93/VTK,arnaudgelas/VTK,spthaolt/VTK,cjh1/VTK,sumedhasingla/VTK,johnkit/vtk-dev,demarle/VTK,msmolens/VTK,Wuteyan/VTK,jmerkow/VTK,arnaudgelas/VTK,gram526/VTK,biddisco/VTK,jeffbaumes/jeffbaumes-vtk,jeffbaumes/jeffbaumes-vtk,johnkit/vtk-dev,aashish24/VTK-old,keithroe/vtkoptix,gram526/VTK,naucoin/VTKSlicerWidgets,daviddoria/PointGraphsPhase1,cjh1/VTK