[Flutter] Implementing a Mention/Tagging Feature in a Flutter Application Similar to LinkedIn

I want to add a mention/tagging feature in my Flutter application. I only have the user's ID or name. When I type '@', I can suggest users similar to LinkedIn, but I am unsure how to proceed further. Specifically, I need the functionality where tapping on a suggested user adds them, and if I delete any character, the mention/tagging should be removed. Just like in LinkedIn, when you tap on any user, they get mentioned/tagged, their color changes, and if you delete even a single character, the mention/tagging is completely removed. I need exactly this feature.

Does anyone have an idea on how to implement this? Please suggest how this can be done.

Does anyone have an idea on how to implement this?

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