/**
* Gets the timestamp of the last entity change across all translations.
*
+ * This method will return the highest timestamp across all translations. To
+ * check that no translation is older than in another version of the entity
+ * (e.g. to avoid overwriting newer translations with old data), compare each
+ * translation to the other version individually.
+ *
* @return int
* The timestamp of the last entity save operation across all
* translations.