drupal8 nested render array in table

drupal8_table_with_render_array.php

<?php
    $header = array();
    foreach ($programs->list as $program) {
      $rows[] = array(
        'img' => array(
          'data' => array(
            '#theme' => 'image',
            '#attributes' => array(
              'src' => $program->images[0]->url, //Images come from an external resources, otherwise use #uri on the level of #attributes
            )
          ),
        ),
        'other_field' => $program->name,
        'programma' => 'more data',
      );
    }
    return [
      '#type' => 'table',
      '#header' => $header,
      '#rows' => $rows,
    ];