View::duplicateDisplayAsType

public View::duplicateDisplayAsType($old_display_id, $new_display_type)

public function duplicateDisplayAsType($old_display_id, $new_display_type) {
  $executable = $this->getExecutable();
  $display = $executable->newDisplay($new_display_type);
  $new_display_id = $display->display['id'];
  $displays = $this->get('display');

  // Let the display title be generated by the addDisplay method and set the
  // right display plugin, but keep the rest from the original display.
  $display_duplicate = $displays[$old_display_id];
  unset($display_duplicate['display_title']);
  unset($display_duplicate['display_plugin']);

  $displays[$new_display_id] = NestedArray::mergeDeep($displays[$new_display_id], $display_duplicate);
  $displays[$new_display_id]['id'] = $new_display_id;

  // First set the displays.
  $this->set('display', $displays);

  // Ensure that we just copy display options, which are provided by the new
  // display plugin.
  $executable->setDisplay($new_display_id);

  $executable->display_handler->filterByDefinedOptions($displays[$new_display_id]['display_options']);
  // Update the display settings.
  $this->set('display', $displays);

  return $new_display_id;
}