title: Antd v4: How to add nesting in <Form.List>?
body: <p>I am trying to create a custom grid like structure.<br>
  The structure will consist of various rows and each row can have multiple columns. And each column will have 1-2 form fields.</p>
  
  <p>With Antd v4.2.0, we have <code>&lt;Form.List /&gt;</code> component with helps us to create dynamic form. </p>
  
  <p>I tried using it and it was fine for the dynamic row part, but I am unable to figure out how can I create mutliple columns ie <code>&lt;Form.List&gt;</code> inside <code>&lt;Form.List&gt;</code></p>
  
  <p>I can create this grid manually as well but I want to leverage the form validation as well within this grid.</p>
  
  <p>Visual representation for what I am trying to create: </p>
  
  <p><a href="https://i.stack.imgur.com/JrCO7.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JrCO7.png" alt="enter image description here"></a></p>