Adds the referenceParameter to the W3CEndpointReference instance wsa:ReferenceParameters element.

Parameters:

referenceParameter

The element to be added to the wsa:ReferenceParameters element.

Returns:  A W3CEndpointReferenceBuilder instance with the referenceParameter added to the wsa:ReferenceParameters element.

Exceptions:

java.lang.IllegalArgumentException

if referenceParameter is null.