How to implement the function of hiding messages in VK?

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I need to implement the hiding function in VK (Version 3.13, build 1183) as in kate mobile. And there is no desire to switch to alternative clients. In kate mobile, with a long press on the dialog, a window pops up where there is a "hide message" button. And in order to open it, you need to enter a special password in the search for messages.