-/* Copyright 2016-2018 Joaquin M Lopez Munoz.
+/* Copyright 2016-2019 Joaquin M Lopez Munoz.
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
namespace detail{
/* Internal *virtual* interface of segment<Model,Allocator> (please note that
- * a non-virtual interface exists accessible thrown downcasting). Member
+ * a non-virtual interface exists accessible through downcasting). Member
* functions have been defined to minimize virtual function calls according to
* usage patterns by poly_collection. For instance, ranges are returned rather
* than iterators to allow for caching of and end sentinel at a higher level.