Result set classes

// structs

struct nanoflann::IndexDist_Sorter;

// classes

template <
    typename DistanceType,
    typename IndexType = size_t,
    typename CountType = size_t
    >
class nanoflann::KNNResultSet;

template <typename DistanceType, typename IndexType = size_t>
class nanoflann::RadiusResultSet;