* @param persistenceUnit
* @return
*/
private SchemaManager getSchemaManagerForPu(final String persistenceUnit)
{
SchemaManager schemaManager = null;
Map<String, Object> externalProperties = KunderaCoreUtils.getExternalProperties(persistenceUnit,
externalPropertyMap, persistenceUnits);
if (getSchemaProperty(persistenceUnit, externalProperties) != null
&& !getSchemaProperty(persistenceUnit, externalProperties).isEmpty())
{