question: intended for use as the type of user-declared elements to make them simple links . gets the value of the content 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 content property . for example , to add a new item , do as follows : getcontent . add newitem ; objects of the following type s are allowed in the list element object string concode_field_sep String role concode_elem_sep String arcrole concode_elem_sep ShowType show concode_elem_sep ActuateType actuate concode_elem_sep String href concode_elem_sep TypeType type concode_elem_sep String title concode_elem_sep List<Object> content concode_field_sep String getHref concode_elem_sep void setHref concode_elem_sep String getRole concode_elem_sep String getArcrole concode_elem_sep void setTitle concode_elem_sep void setActuate concode_elem_sep void setArcrole concode_elem_sep ActuateType getActuate concode_elem_sep void setType concode_elem_sep void setShow concode_elem_sep String getTitle concode_elem_sep TypeType getType concode_elem_sep ShowType getShow concode_elem_sep void setRole
target: List < Object > function ( ) { if ( content == null ) { content = new ArrayList < Object > ( ) ; } return this . content ; }