/**
* {@inheritdoc}
*/
protected function buildExtraFieldRow($field_id, $extra_field, EntityDisplayInterface $entity_display)
{
$extra_field_row = parent::buildExtraFieldRow($field_id, $extra_field, $entity_display);
// Insert an empty placeholder for the label column.
$label = array('empty_cell' => array('#markup' => ' '));
$label_position = array_search('plugin', array_keys($extra_field_row));
$extra_field_row = array_slice($extra_field_row, 0, $label_position, TRUE) + $label + array_slice($extra_field_row, $label_position, count($extra_field_row) - 1, TRUE);
return $extra_field_row;
}
