Feature Request: Custom Actions

[user520881]

Would it be possible to mappings take a function like in the pseudo code below.

In my case, i want to use a custom keymap to perform a custom action, e.g. use visidata to open a pandas dataframe.

-- Setup dapui
dapui.setup({
  element_mappings = {
    variables = {
      ["h"] = function()
        print("hello")
      end,
    },
    scopes = {
      ["h"] = function()
        vim.notify("hello from scopes")
      end,
    },
  },
})