Customer GET_EXPANDED_ENTITYSET - prevent call to children Entits Set?

Hi,

I have a OData Gateway Service with nested entities (Entity A can be expanded with Entities B and C; natigation properties "Bs" and "Cs").

Now I redefined GET_EXPANDED_ENTITYSET and call in there a method that fills the complete return structure (including the expanded entities).

After that I something like "APPEND 'BS' TO et_expanded_tech_clauses" (and same for Cs). But still the framework calls GET_EXPANDED_ENTITYSET for entities A and B - which I don't want since everything is already completely filled.

What am I doing wrong?

Thanks in advance!