New reference notification in a group library

I use the group library of zotero to share references with my colleague when we work n the same project/paper. The library is growing and it is not easy to notice what and who was recently added a new item. I wish that after I drag and drop an item to the shared group it will be flagged or an e-mail will be sent to the colleague: "Please note I added the following reference".
Is there a feature like this? Is it in the to do list?
Thanks for the wonderful tool - Zotero,
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