Custom Material Expression for WorldAlignedTexture node

I’m trying to create a Quick Material creator widget, which creates a UMaterial by C++, wherein I’m trying to add TextureObject node to WorldAlignedTexture node to BaseColor node of Material.
But I can’t find any UMaterialExpressionWorldAlignedTexture and BreakOutFloat3Components node in C++ for slate widgets.
Could you please advice?