message: Add documentation for radiusSearch
diff: @@ -217,6 +217,17 @@ public:
  std::vector<DistanceType>& dists, int knn, const ::cvflann::SearchParams& params);
  void knnSearch(const Mat& queries, Mat& indices, Mat& dists, int knn, const ::cvflann::SearchParams& params);
  + /** @brief Performs a radius nearest neighbor search for a given query point using the index.
  +
  + @param query The query point.
  + @param indices Vector that will contain the indices of the nearest neighbors found.
  + @param dists Vector that will contain the distances to the nearest neighbors found. It has the same
  + number of elements as indices.
  + @param radius The search radius.
  + @param params SearchParams
  +
  + This function returns the number of nearest neighbors found.
  + */
  int radiusSearch(const std::vector<ElementType>& query, std::vector<int>& indices,
  std::vector<DistanceType>& dists, DistanceType radius, const ::cvflann::SearchParams& params);
  int radiusSearch(const Mat& query, Mat& indices, Mat& dists,
  