rann → neighbor_search Relation

File in mlpack-3.4.2/src/mlpack/methods/rann	Includes file in mlpack-3.4.2/src/mlpack/methods/neighbor_search
ra_query_stat.hpp	sort_policies / nearest_neighbor_sort.hpp
ra_search.hpp	sort_policies / nearest_neighbor_sort.hpp
ra_typedef.hpp	sort_policies / furthest_neighbor_sort.hpp
ra_typedef.hpp	sort_policies / nearest_neighbor_sort.hpp