title: Display chained products meta on admin product column
body: <p>I am trying to display chained products meta on admin product column but it just seems to display array. What is the bug? Thanks guys!</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>// ADDING A CUSTOM COLUMN TITLE TO ADMIN PRODUCTS LIST
  add_filter( 'manage_edit-product_columns', 'custom_product_column',11);
  function custom_product_column($columns)
  {
     //add columns
     $columns['chain_product'] = __( 'Custom','woocommerce'); // title
     return $columns;
  }
  
  // ADDING THE DATA FOR EACH PRODUCTS BY COLUMN (EXAMPLE)
  add_action( 'manage_product_posts_custom_column' , 'custom_product_list_column_content', 10, 2 );
  function custom_product_list_column_content( $column, $product_id )
  {
      global $post;
    $chained_parent_id = empty( $variation ) ? $post-&gt;ID : $variation-&gt;ID;
  
      // HERE get the data from your custom field (set the correct meta key below)
      $chain_product = get_post_meta( $chained_parent_id, '_chained_product_detail', true );
  
      switch ( $column )
      {
          case 'chain_product' :
              echo $chain_product; // display the data
              break;
      }
  }</code></pre>
  </div>
  </div>
  </p>