question: gets the value of the param 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 param property . for example , to add a new item , do as follows : getparam . add newitem ; objects of the following type s are allowed in the list param concode_field_sep List<Param> param concode_elem_sep List<Doc> doc concode_elem_sep Map<QName,String> otherAttributes concode_elem_sep String id concode_elem_sep List<Object> any concode_elem_sep List<Object> methodOrResource concode_field_sep void setId concode_elem_sep List<Doc> getDoc concode_elem_sep String getId concode_elem_sep List<Object> getMethodOrResource concode_elem_sep Map<QName,String> getOtherAttributes concode_elem_sep List<Object> getAny
target: List < Param > function ( ) { if ( param == null ) { param = new ArrayList < Param > ( ) ; } return this . param ; }