Force panel to re-render from within another panel

I need to make a certain panel re-render upon a click on another panel.
I have an ajax panel with a list of buttons. is there any function / method I can trigger that will force a target panel to re-render?

The most common way to communicate between panels is by using dashboard variables. A panel that depends on a variable will re-render whenever that variable changes.

You could then update the variable from your other panel to trigger the re-render.

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