ENH: per user request, make it virtual
ENH: per user request, make it virtual

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