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auto y = make_unique<MultiFab>(x->boxArray(), x->DistributionMap(),
x->nComp(), x->nGrowVect());
MultiFab::Copy(*y, *x, 0, 0, y->nComp(), y->nGrowVect());
auto y = make_unique<amrex::MultiFab>(x->boxArray(), x->DistributionMap(),
x->nComp(), x->nGrowVect());
amrex::MultiFab::Copy(*y, *x, 0, 0, y->nComp(), y->nGrowVect());
MultiFab::Saxpy(*y.mfabs.at(n), alpha, *x.mfabs.at(n), 0, 0,
y.mfabs.at(n)->nComp(), y.mfabs.at(n)->nGrowVect());
amrex::MultiFab::Saxpy(*y.mfabs.at(n), alpha, *x.mfabs.at(n), 0, 0,
y.mfabs.at(n)->nComp(), y.mfabs.at(n)->nGrowVect());
MultiFab::LinComb(*z.mfabs.at(n), alpha, *x.mfabs.at(n), 0, beta,
*y.mfabs.at(n), 0, 0, z.mfabs.at(n)->nComp(),
z.mfabs.at(n)->nGrowVect());
amrex::MultiFab::LinComb(*z.mfabs.at(n), alpha, *x.mfabs.at(n), 0, beta,
*y.mfabs.at(n), 0, 0, z.mfabs.at(n)->nComp(),
z.mfabs.at(n)->nGrowVect());