contrib/Eigen/src/NumericalDiff/InternalHeaderCheck.h

// SPDX-FileCopyrightText: The Eigen Authors
// SPDX-License-Identifier: MPL-2.0

#ifndef EIGEN_NUMERICALDIFF_MODULE_H
#error "Please include contrib/Eigen/NumericalDiff instead of including headers inside the src directory directly."
#endif