Make sure traits are active for all cover trees.
Make sure traits are active for all cover trees.

erubboli/mlpack,darcyliu/mlpack,darcyliu/mlpack,chenmoshushi/mlpack,thirdwing/mlpack,stereomatchingkiss/mlpack,ranjan1990/mlpack,theranger/mlpack,lezorich/mlpack,stereomatchingkiss/mlpack,ajjl/mlpack,lezorich/mlpack,ajjl/mlpack,ranjan1990/mlpack,erubboli/mlpack,Azizou/mlpack,palashahuja/mlpack,datachand/mlpack,datachand/mlpack,trungda/mlpack,stereomatchingkiss/mlpack,ersanliqiao/mlpack,thirdwing/mlpack,Azizou/mlpack,bmswgnp/mlpack,datachand/mlpack,minhpqn/mlpack,palashahuja/mlpack,erubboli/mlpack,palashahuja/mlpack,ersanliqiao/mlpack,lezorich/mlpack,chenmoshushi/mlpack,Azizou/mlpack,BookChan/mlpack,darcyliu/mlpack,trungda/mlpack,bmswgnp/mlpack,thirdwing/mlpack,minhpqn/mlpack,ajjl/mlpack,ersanliqiao/mlpack,BookChan/mlpack,theranger/mlpack,trungda/mlpack,bmswgnp/mlpack,BookChan/mlpack,theranger/mlpack,ranjan1990/mlpack,minhpqn/mlpack,chenmoshushi/mlpack