text: #ifndef PASTEL_NEIGHBOR_META_SIZE_OF_HPP
  # define PASTEL_NEIGHBOR_META_SIZE_OF_HPP
  
  # include <cstddef>
  
  
  namespace pastel
  {
    namespace neighbor
    {
      namespace meta
      {
        template <typename NeighborList>
        struct size_of
        { using type = typename NeighborList::size_type; };
      } // namespace meta
    } // namespace neighbor
  } // namespace pastel
  
  
  #endif // PASTEL_NEIGHBOR_META_SIZE_OF_HPP
  
  