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diff --git a/source/blender/io/usd/import/usd_data_cache.h b/source/blender/io/usd/import/usd_data_cache.h
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+++ b/source/blender/io/usd/import/usd_data_cache.h
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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.
+ *
+ * The Original Code is Copyright (C) 2020 Blender Foundation.
+ * All rights reserved.
+ */
+#pragma once
+
+#include <map>
+
+#include <pxr/usd/sdf/path.h>
+
+struct Mesh;
+
+namespace blender::io::usd {
+
+/* Caches data imported from USD, typically shared data for instanced primitives. */
+
+class USDDataCache {
+ protected:
+  /* Shared meshes for instancing. */
+  std::map<pxr::SdfPath, Mesh *> prototype_meshes_;
+
+ public:
+  USDDataCache();
+
+  ~USDDataCache();
+
+  const std::map<pxr::SdfPath, Mesh *> &prototype_meshes() const
+  {
+    return prototype_meshes_;
+  }
+
+  void clear_prototype_meshes()
+  {
+    /* TODO(makowalsk): should we decrement mesh use counts or delete meshes?  */
+    prototype_meshes_.clear();
+  }
+
+  bool add_prototype_mesh(const pxr::SdfPath path, Mesh *mesh);
+
+  void clear_protype_mesh(const pxr::SdfPath &path);
+
+  Mesh *get_prototype_mesh(const pxr::SdfPath &path) const;
+
+};
+
+}  // namespace blender::io::usd