How to index special catalog(Not index all catalog) in episerver commerce

Hi,

My site have five catalogs and each time i ran a job import to import new data for per catalog and then i call the 

method BuildIndex(false) in order to incrementally updates the index

This method will index all catalogs but i don't want to index all of them, i just want to index specific catalog

So, is there any way to custom index by specific catalog?

Thanks

Thao Pham