This constant is used to decide if we should track a JAX-WS handler's usage
of the SOAPHeadersAdapter along with SAAJ. If this property is set to 'true',
then the handler framework will track whether a handler has called any getters/setters/etc
on the SOAPHeadersAdapter AND called any API under Message to get SAAJ objects. Both
of these cause transformations of data, and together would be more expensive than
if they were separated.