jpa/subsystem/src/main/java/org/jboss/as/jpa/container/NonTxEmCloser.java
public static EntityManager get(String puScopedName) {
        Map<String, EntityManager> map = nonTxStack.peek();
        if (map != null) {
            return map.get(puScopedName);
        }
        return null;
    }
public static EntityManager get(String puScopedName) {
        Map<String, EntityManager> map = nonTxStack.peek();
        if (map != null) {
            return map.get(puScopedName);
        }
        return null;
    }
Return the transactional entity manager for the specified scoped persistence unit name

@param puScopedName
@return