getUserData
Gets the value of the userData property.
This accessor method returns a reference to the live list, not a snapshot. Therefore any modification you make to the returned list will be present inside the JAXB object. This is why there is not a set
method for the userData property.
For example, to add a new item, do as follows:
getUserData().add(newItem);
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Objects of the following type(s) are allowed in the list UserData
Return
Thevalue of the userData property.