close tree

17:58:15 <0.1326.0>({riak_kv_index_hashtree,init,1}) {riak_kv_index_hashtree,
                                                      close_trees,
                                                      [{state,
                                                        936274486415109681974235595958868809467081785344,...}]}

17:59:03 <0.1326.0>({riak_kv_index_hashtree,init,1}) riak_kv_index_hashtree:close_trees/1 -> {state,
                                                                                              936274486415109681974235595958868809467081785344,
                                                                                              <0.1242.0>,
                                                                                              true,
                                                                                              true,
                                                                                              undefined,...}