Loading a panel with context programaticly

panel_context_pane.php

    <?php
    ctools_include('context');
    ctools_include('content');

    // Load ctools context from the arguments.
    $context = array();
    $context_arguments = array(
      'identifier' => 'node', // Required: Identifier to the panel.
      'name' => 'entity_id:node', // Required: Identifier used by argument plugins.
      'title' => 'Node', // Optional.
      'keyword' => 'node', // Required: Purpose?
      'id' => '1' // Required: Needed for uniqueness.
    );
    $nid = $node->get('nid')->value();
    $context = ctools_context_get_context_from_argument($context_arguments, $nid);

    // Load the panel pane.
    $type = 'slider';
    $subtype = 'slider';
    $conf = NULL;
    $contexts = array('node' => $context);
    $keywords = array();
    $args = array();

    $data = ctools_content_render($type, $subtype, $conf, $keywords, $args, $contexts);

    print $data->content;