use `getCommunication()` instead of `getCollectiveCommunication()`

dune/gfe/mixedlocalgfeadolcstiffness.hh

@@ -86,7 +86,7 @@ energy(const typename Basis::LocalView& localView,
        const std::vector<TargetSpace0>& localConfiguration0,
        const std::vector<TargetSpace1>& localConfiguration1) const
 {
-    int rank = Dune::MPIHelper::getCollectiveCommunication().rank();
+    int rank = Dune::MPIHelper::getCommunication().rank();
     double pureEnergy;
 
     std::vector<ATargetSpace0> localAConfiguration0(localConfiguration0.size());
@@ -202,7 +202,7 @@ assembleGradientAndHessian(const typename Basis::LocalView& localView,
                            std::vector<typename TargetSpace0::TangentVector>& localGradient0,
                            std::vector<typename TargetSpace1::TangentVector>& localGradient1)
 {
-    int rank = Dune::MPIHelper::getCollectiveCommunication().rank();
+    int rank = Dune::MPIHelper::getCommunication().rank();
     // Tape energy computation.  We may not have to do this every time, but it's comparatively cheap.
     energy(localView, localConfiguration0, localConfiguration1);
 

dune/gfe/mixedriemanniantrsolver.cc

@@ -317,7 +317,7 @@ void MixedRiemannianTrustRegionSolver<GridType,Basis,Basis0,TargetSpace0,Basis1,
     using namespace Dune::TypeTree::Indices;
 
     double oldEnergy = assembler_->computeEnergy(x_[_0], x_[_1]);
-    oldEnergy = mpiHelper.getCollectiveCommunication().sum(oldEnergy);
+    oldEnergy = mpiHelper.getCommunication().sum(oldEnergy);
 
     bool recomputeGradientHessian = true;
     CorrectionType rhs;
@@ -498,7 +498,7 @@ void MixedRiemannianTrustRegionSolver<GridType,Basis,Basis0,TargetSpace0,Basis1,
           }
 
           if (solvedByInnerSolver) {
-            energy = mpiHelper.getCollectiveCommunication().sum(energy);
+            energy = mpiHelper.getCommunication().sum(energy);
 
             // compute the model decrease
             // It is $ m(x) - m(x+s) = -<g,s> - 0.5 <s, Hs>
@@ -506,7 +506,7 @@ void MixedRiemannianTrustRegionSolver<GridType,Basis,Basis0,TargetSpace0,Basis1,
             CorrectionType tmp(corr);
             hessianMatrix_->mv(corr,tmp);
             modelDecrease = rhs*corr - 0.5 * (corr*tmp);
-            modelDecrease = mpiHelper.getCollectiveCommunication().sum(modelDecrease);
+            modelDecrease = mpiHelper.getCommunication().sum(modelDecrease);
 
             double relativeModelDecrease = modelDecrease / std::fabs(energy);