ATLAS-409-00-002: Given type xxx has references

Hello,

I am trying to delete a custom Type, but I receive the error "ATLAS-409-00-002: Given type InformationAssets has references".  This type has no entities and no relationships associated with it. 

I created a second custom Type (which I can delete) and compared the API results from: /api/atlas/v2/types/typedef/name/
But both look the same.  I'm not sure what the dependency is?  

Is there anyway to find out what references are out there for this custom Type?