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View: Toggle Install-Support Prompts
view.toggleInstallPrompts Show or hide the in-editor banner that offers to install a language's server/debugger when it's missing.
How to run it
Open the command palette (M-x in the Emacs keymap) and search for View: Toggle Install-Support Prompts, then press Enter. It has no default keybinding, but you can bind one in Settings → Keymaps.