text: 
  ..
      Copyright (c) 2019 The STE||AR-Group
  
      SPDX-License-Identifier: BSL-1.0
      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)
  
  ===
  functional
  ===
  
  This library is part of HPX.
  
  Documentation can be found `here
  <https://hpx-docs.stellar-group.org/latest/html/libs/functional/docs/index.html>`__.
  