[jexl] how to access properties of nested java dataobject

[cloudsuser cloudsuser]

Using the syntax "${status}" as defined below i can able to access the value
of status form JavaBeanObject(A)

        <column name="STATUS" type="string">
            <value>${status}</value>
        </column>

But how to get the value of nested bean object.Example...
public class A {
  private String status;
  private B b;
  .....
  ..........
}

How to get the value of b.getStatus(); ????????????? Need to replace
${status} to ${b.status}  ????????