title: When does @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW) commit?
body: <p>An EJB method named <code>Aby</code> calls another EJB method named <code>Bob</code></p>
  <p><code>Bob</code> is marked with <code>@TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)</code></p>
  <h3>When does <code>bob</code> transaction commits?:</h3>
  <p>a) when <code>bob</code> invocation ends</p>
  <p>b) when <code>aby</code> invocation ends</p>
  <p>c) other. when?</p>