How to accuire and update value in concurrent_hash_map in TBB?

So The operations count, find, insert, and erase are the only operations that may be concurrently invoked on the same concurrent_hash_map so how to update a value in it? (alike transaction which would include find+(insert||update||erase+insert)). I would use unordered map yet it does not provide concurrent erase.

So I wonder how to insert or update a key value pair in tbb::concurrent_hash_map?