return {
  'scalameta/nvim-metals',
  dependencies = {
    'nvim-lua/plenary.nvim',
  },
  ft = { 'scala', 'sbt', 'java' },
  opts = function()
    local metals_config = require('metals').bare_config()
    metals_config.on_attach = function(client, bufnr)
      -- your on_attach function
      vim.keymap.set('n', 'K', vim.lsp.buf.hover)
    end

    return metals_config
  end,
  config = function(self, metals_config)
    local nvim_metals_group = vim.api.nvim_create_augroup('nvim-metals', { clear = true })
    vim.api.nvim_create_autocmd('FileType', {
      pattern = self.ft,
      callback = function()
        require('metals').initialize_or_attach(metals_config)
      end,
      group = nvim_metals_group,
    })
  end,
}