UMaterialFunctionInterface not being tagged as BlueprintType makes some editor scripting scenarios difficult

UMaterialInterface is BlueprintType, but UMaterialFunctionInterface is not. This makes it difficult to port some BP logic that works with materials to the material layer system. Crystal Dynamics would like to have this changed

Steps to Reproduce

Create an editor BP like an Editor Utility Widget that uses UMaterialEditingLibrary. Some nodes like UpdateMaterialFunction are awkward to use since you cannot create a variable of type UMaterialFunctionInterface in BP