abstract fun obtainPersistenceUnitInfo(persistenceUnitName: String): PersistenceUnitInfo
Obtain the specified PersistenceUnitInfo from this manager.
persistenceUnitName - the name of the desired persistence unit
IllegalArgumentException - if no PersistenceUnitInfo with the given name is defined
IllegalStateException - if the PersistenceUnitInfo with the given name has already been obtained
Return
the PersistenceUnitInfo (never null)