如何自定义Typus Admin for Rails使用特殊表格？

class CustomTableBuilder < Typus::TableBuilder
  def header
    # 自定义表头
  end

  def row(item)
    # 自定义行
  end

  def footer
    # 自定义表尾
  end
end

class PostsController< ApplicationController
  def index
    @posts = Post.all
  end

  def table_builder
    CustomTableBuilder
  end
end

  <%= table_for(@posts) do |t| %>
    <% t.header do %>
      <th>Title</th>
      <th>Author</th>
      <th>Published</th>
    <% end %>

    <% t.body do |post| %>
      <tr>
        <td><%= post.title %></td>
        <td><%= post.author %></td>
        <td><%= post.published %></td>
      </tr>
    <% end %>

    <% t.footer do %>
      <tr>
        <td colspan="3">Total: <%= @posts.size %></td>
      </tr>
    <% end %>
  <% end %>
</table>