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diff --git a/libs/assimp/code/AssetLib/3MF/XmlSerializer.h b/libs/assimp/code/AssetLib/3MF/XmlSerializer.h
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+++ b/libs/assimp/code/AssetLib/3MF/XmlSerializer.h
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+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2022, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+#pragma once
+
+#include <assimp/XmlParser.h>
+#include <assimp/mesh.h>
+#include <vector>
+#include <map>
+
+struct aiNode;
+struct aiMesh;
+struct aiMaterial;
+
+namespace Assimp {
+namespace D3MF {
+
+class Resource;
+class D3MFOpcPackage;
+class Object;
+class Texture2DGroup;
+class EmbeddedTexture;
+
+class XmlSerializer {
+public:
+    XmlSerializer(XmlParser *xmlParser);
+    ~XmlSerializer();
+    void ImportXml(aiScene *scene);
+
+private:
+    void addObjectToNode(aiNode *parent, Object *obj, aiMatrix4x4 nodeTransform);
+    void ReadObject(XmlNode &node);
+    aiMesh *ReadMesh(XmlNode &node);
+    void ReadMetadata(XmlNode &node);
+    void ImportVertices(XmlNode &node, aiMesh *mesh);
+    void ImportTriangles(XmlNode &node, aiMesh *mesh);
+    void ReadBaseMaterials(XmlNode &node);
+    void ReadEmbeddecTexture(XmlNode &node);
+    void StoreEmbeddedTexture(EmbeddedTexture *tex);
+    void ReadTextureCoords2D(XmlNode &node, Texture2DGroup *tex2DGroup);
+    void ReadTextureGroup(XmlNode &node);
+    aiMaterial *readMaterialDef(XmlNode &node, unsigned int basematerialsId);
+    void StoreMaterialsInScene(aiScene *scene);
+
+private:
+    struct MetaEntry {
+        std::string name;
+        std::string value;
+    };
+    std::vector<MetaEntry> mMetaData;
+    std::vector<EmbeddedTexture *> mEmbeddedTextures;
+    std::vector<aiMaterial *> mMaterials;
+    std::map<unsigned int, Resource *> mResourcesDictionnary;
+    unsigned int mMeshCount;
+    XmlParser *mXmlParser;
+};
+
+} // namespace D3MF
+} // namespace Assimp