Document comment added

Author: InsaneSkull

src/TabularColumn.php

@@ -20,7 +20,18 @@
 class TabularColumn extends BaseColumn
 {
     /**
-     * @var array the HTML attributes for the body cell tag.
+     * @var array|\Closure the HTML attributes for the table body columns. This can be either an array
+     * specifying the common HTML attributes for all body column, or an anonymous function that
+     * returns an array of the HTML attributes. It should have the following signature:
+     *
+     * ```php
+     * function ($model, $index, $context)
+     * ```
+     *
+     * - `$model`: the current data model being rendered
+     * - `$index`: the zero-based index of the data model in the model array
+     * - `$context`: the widget object
+     *
      */
     public $columnOptions = [];