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diff --git a/source/blender/functions/FN_multi_function_network_evaluation.hh b/source/blender/functions/FN_multi_function_network_evaluation.hh
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+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __FN_MULTI_FUNCTION_NETWORK_EVALUATION_HH__
+#define __FN_MULTI_FUNCTION_NETWORK_EVALUATION_HH__
+
+/** \file
+ * \ingroup fn
+ */
+
+#include "FN_multi_function_network.hh"
+
+namespace blender::fn {
+
+class MFNetworkEvaluationStorage;
+
+class MFNetworkEvaluator : public MultiFunction {
+ private:
+  Vector<const MFOutputSocket *> inputs_;
+  Vector<const MFInputSocket *> outputs_;
+
+ public:
+  MFNetworkEvaluator(Vector<const MFOutputSocket *> inputs, Vector<const MFInputSocket *> outputs);
+
+  void call(IndexMask mask, MFParams params, MFContext context) const override;
+
+ private:
+  using Storage = MFNetworkEvaluationStorage;
+
+  void copy_inputs_to_storage(MFParams params, Storage &storage) const;
+  void copy_outputs_to_storage(
+      MFParams params,
+      Storage &storage,
+      Vector<const MFInputSocket *> &outputs_to_initialize_in_the_end) const;
+
+  void evaluate_network_to_compute_outputs(MFContext &global_context, Storage &storage) const;
+
+  void evaluate_function(MFContext &global_context,
+                         const MFFunctionNode &function_node,
+                         Storage &storage) const;
+
+  bool can_do_single_value_evaluation(const MFFunctionNode &function_node, Storage &storage) const;
+
+  void initialize_remaining_outputs(MFParams params,
+                                    Storage &storage,
+                                    Span<const MFInputSocket *> remaining_outputs) const;
+};
+
+}  // namespace blender::fn
+
+#endif /* __FN_MULTI_FUNCTION_NETWORK_EVALUATION_HH__ */