https://ogrecave.github.io/ogre-next/api/2.1/class_ogre_1_1_n_u_l_l_vao_manager.html
OGRE: Ogre::NULLVaoManager Class Reference
ogreclassreference
https://ogrecave.github.io/ogre-next/api/latest/struct_ogre_1_1_n_u_l_l_vao_manager_1_1_vao_1_1_vertex_binding.html
OGRE-Next: Ogre::NULLVaoManager::Vao::VertexBinding Struct Reference
ogrenextvaostructreference