Add support for iterator
Add support for iterator

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