cking the row(s) for the entity instance in the
 additional table(s).  Entity relationships for which the locked
 entity contains the foreign key will also be locked, but not
 the state of the referenced entities (unless those entities are
 explicitly locked).  Element collections and relationships for
 which the entity does not contain the foreign key (such as
 relationships that are mapped to join tables or unidirectional
 one-to-many relationships for which the target entity contains
 the foreign key) wi