protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $reset = FALSE) {
$schema = parent::getEntitySchema($entity_type, $reset);
$schema[$this->storage
->getDataTable()]['indexes'] += array(
'paragraphs__parent_fields' => array(
'parent_type',
'parent_id',
'parent_field_name',
),
);
$schema[$this->storage
->getRevisionDataTable()]['indexes'] += array(
'paragraphs__parent_fields' => array(
'parent_type',
'parent_id',
'parent_field_name',
),
);
return $schema;
}