If possible get  "COMPONENT INTERFACE"  information from a 3D model?

Hello,

If possible get  "COMPONENT INTERFACE"  information from a 3D model?

I get the feature by use 

FeatureType.FEATTYPE_COMP_INTERFACE);

and find this feature is implement the interface "WFeature".

But I don`t find the the class for this "COMPONENT INTERFACE" feature .

Would you know how to get these information?