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diff --git a/Source/Python/pyWarpX.H b/Source/Python/pyWarpX.H
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+/* Copyright 2021-2022 The WarpX Community
+ *
+ * This header is used to centrally define classes that shall not violate the
+ * C++ one-definition-rule (ODR) for various Python translation units.
+ *
+ * Authors: Axel Huebl
+ * License: BSD-3-Clause-LBNL
+ */
+#include <pybind11/pybind11.h>
+#include <pybind11/stl.h>
+#include <pybind11/stl_bind.h>
+#include <pybind11/functional.h>
+#include <pybind11/numpy.h>
+
+#include <list>
+
+namespace py = pybind11;
+//using namespace warpx;
+
+// PYBIND11_MAKE_OPAQUE(std::list<...>)