void AddElement ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FMLDeformerInputBoneTreeElement](API\Plugins\MLDeformerFrameworkEditor\FMLDeformerInputBoneTreeElement) > Element, [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FMLDeformerInputBoneTreeElement](API\Plugins\MLDeformerFrameworkEditor\FMLDeformerInputBoneTreeElement) > ParentElement )