nabla_X 221 src/secOrd_op_solutionDriven_impl.h MCF_op::Jacobian_range<MCF_op::Vector_fef> nabla_X; nabla_X 222 src/secOrd_op_solutionDriven_impl.h cf.jacobian(q[pt], nabla_X); nabla_X 223 src/secOrd_op_solutionDriven_impl.h return nabla_X;