cmake find_package(ITKInternalEigen3) examples

InsightSoftwareConsortium/ITK CMake/itkExternal_Eigen3.cmake :83 

find_package(ITKInternalEigen3 CONFIG REQUIRED QUIET)

InsightSoftwareConsortium/ITK Modules/ThirdParty/Eigen3/CMakeLists.txt :23 

# find_package(ITKInternalEigen3 CONFIG) otherwise