require("nvim-semantic-tokens").setup {
  preset = "default",
  -- highlighters is a list of modules following the interface of nvim-semantic-tokens.table-highlighter or 
  -- function with the signature: highlight_token(ctx, token, highlight) where 
  --        ctx (as defined in :h lsp-handler)
  --        token  (as defined in :h vim.lsp.semantic_tokens.on_full())
  --        highlight (a helper function that you can call (also multiple times) with the determined highlight group(s) as the only parameter)
  highlighters = { require 'nvim-semantic-tokens.table-highlighter'}
}

local on_attach = function(client, bufnr)
    local caps = client.server_capabilities
    if caps.semanticTokensProvider and caps.semanticTokensProvider.full then
      local augroup = vim.api.nvim_create_augroup("SemanticTokens", {})
      vim.api.nvim_create_autocmd("TextChanged", {
        group = augroup,
        buffer = bufnr,
        callback = function()
          vim.lsp.buf.semantic_tokens_full()
        end,
      })
      -- fire it first time on load as well
      vim.lsp.buf.semantic_tokens_full()
    end
    --...
end