How to alter a default key

[taylorvance]

This may be more of a general Lazy question. I want what is currently happening with gb (toggle current buffer filter) to happen with ctrl-b. Here's what I have in my lazy init. I'd rather not hardcode existing code. Is there a way to instead reference the gb key here?

{'folke/trouble.nvim',
    cmd = 'Trouble',
    opts = {
        keys = {
            ['<cr>'] = 'jump_close',
            ['<esc>'] = 'close',
            ['<c-b>'] = { -- copied from "gb" key in Default Settings
                action = function(view)
                    view:filter({ buf = 0 }, { toggle = true })
                end,
                desc = "Toggle Current Buffer Filter",
            },
        },
    },
},