std::vector<IndexSet> boundary_indices;
/**
- * old data structure only filled on demand
+ * Old data structure that is only filled on demand from @p boundary_indices
+ * for deprecated get_boundary_indices().
*/
mutable std::vector<std::set<types::global_dof_index> > boundary_indices_old;
/**
- * The degrees of freedom on the refinement edge between a level and coarser
- * cells.
+ * The degrees of freedom on a given level that live on the refinement edge
+ * between the level and cells on a coarser level.
*/
std::vector<IndexSet> refinement_edge_indices;
/**
- * old data structure only filled on demand
+ * Old data structure that is only filled on demand for deprecated
+ * get_refinement_edge_boundary_indices().
*/
mutable std::vector<std::vector<bool> > refinement_edge_boundary_indices_old;
/**
- * old data structure only filled on demand
+ * Old data structure that is only filled on demand for deprecated
+ * get_refinement_edge_indices().
*/
mutable std::vector<std::vector<bool> > refinement_edge_indices_old;
};