attempt a dynamic cast to a IDMap2, thus checking check whether the underlying index type is IndexIDMap.
@param index opaque pointer to index object @return the same pointer if the index is a IDMap2 index, NULL otherwise
See Implementation
attempt a dynamic cast to a IDMap2, thus checking check whether the underlying index type is IndexIDMap.
@param index opaque pointer to index object @return the same pointer if the index is a IDMap2 index, NULL otherwise