cmake ArborX examples

dealii/dealii cmake/modules/FindDEAL_II_ARBORX.cmake :30 

find_package(ArborX QUIET
  HINTS ${ARBORX_DIR} ${ArborX_DIR} $ENV{ArborX_DIR}
  )

trilinos/Trilinos packages/stk/CMakeLists.txt :138 

find_package(ArborX QUIET)