jpa/subsystem/src/main/java/org/jboss/as/jpa/container/SFSBCallStack.java
static Map<String, ExtendedEntityManager> getCurrentCall() {
        ArrayList<Map<String, ExtendedEntityManager>> stack = currentSFSBCallStack();
        Map<String, ExtendedEntityManager> result = null;
        if (stack != null) {
            result = stack.get(stack.size() - 1);
        }
        return result;
    }
static Map<String, ExtendedEntityManager> getCurrentCall() {
        ArrayList<Map<String, ExtendedEntityManager>> stack = currentSFSBCallStack();
        Map<String, ExtendedEntityManager> result = null;
        if (stack != null) {
            result = stack.get(stack.size() - 1);
        }
        return result;
    }
gets the current SFSB invocation off the invocation call stack

@return the entity manager map