BUG: Do not try to use MultiGroupDataInformation if it is null. Instantiate one in that case
BUG: Do not try to use MultiGroupDataInformation if it is null. Instantiate one in that case

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