Make handler symbol private
Make handler symbol private

kotfic/girder,data-exp-lab/girder,RafaelPalomar/girder,jbeezley/girder,girder/girder,Kitware/girder,data-exp-lab/girder,Kitware/girder,kotfic/girder,jbeezley/girder,Kitware/girder,data-exp-lab/girder,RafaelPalomar/girder,girder/girder,kotfic/girder,kotfic/girder,manthey/girder,RafaelPalomar/girder,data-exp-lab/girder,manthey/girder,jbeezley/girder,kotfic/girder,data-exp-lab/girder,manthey/girder,girder/girder,girder/girder,Kitware/girder,RafaelPalomar/girder,RafaelPalomar/girder,jbeezley/girder,manthey/girder