COMP: Use newer API to check if HDF5 group exists.
COMP: Use newer API to check if HDF5 group exists.

KitwareMedical/ITKUltrasound,thewtex/ITKUltrasound,thewtex/ITKUltrasound,KitwareMedical/ITKUltrasound,KitwareMedical/ITKUltrasound,thewtex/ITKUltrasound