#include <deal.II/base/config.h>
-#include <deal.II/base/enable_observer_pointer.h>
#include <deal.II/base/exceptions.h>
#include <deal.II/base/memory_consumption.h>
#include <deal.II/base/numbers.h>
#ifdef DEAL_II_WITH_PETSC
-# include <deal.II/base/enable_observer_pointer.h>
# include <deal.II/base/index_set.h>
# include <deal.II/lac/exceptions.h>
#include <deal.II/base/aligned_vector.h>
#include <deal.II/base/communication_pattern_base.h>
-#include <deal.II/base/enable_observer_pointer.h>
#include <deal.II/base/index_set.h>
#include <deal.II/base/memory_consumption.h>
#include <deal.II/base/mpi_stub.h>
#ifdef DEAL_II_WITH_TRILINOS
-# include <deal.II/base/enable_observer_pointer.h>
# include <deal.II/base/index_set.h>
# include <deal.II/base/mpi_stub.h>
#ifdef DEAL_II_TRILINOS_WITH_TPETRA
-# include <deal.II/base/enable_observer_pointer.h>
# include <deal.II/base/index_set.h>
# include <deal.II/base/mpi_stub.h>
#include <deal.II/base/config.h>
#ifdef DEAL_II_WITH_TRILINOS
-# include <deal.II/base/enable_observer_pointer.h>
# include <deal.II/base/index_set.h>
# include <deal.II/base/mpi_stub.h>
# include <deal.II/base/partitioner.h>
#include <deal.II/base/config.h>
#include <deal.II/base/aligned_vector.h>
-#include <deal.II/base/enable_observer_pointer.h>
#include <deal.II/base/exceptions.h>
#include <deal.II/base/index_set.h>
#include <deal.II/base/numbers.h>