ENH: Fix example to not build if METAIO is not enabled.
ENH: Fix example to not build if METAIO is not enabled.

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