040000 tree 533ecbb41d6f4225dde4324bf6287a5ed3c55e1a	frequencies
040000 tree ef049fba21ad7731ae5ef742442ec95cfda2ee37	hll
040000 tree f7e98c0678c07f622ca2a0a4974dc46c42f14099	kll
040000 tree b60f91170fe26347255507d09da43cc617366422	quantiles
040000 tree e9c24b45f41b2c7d438cd810a9fb5f3da1a4bff2	theta
040000 tree 78ae4901e3803060b27aec6da6e3dfad0aed19fe	tuple