question: the returned system identifier is always null . concode_field_sep XMLEventWriter xmlEventWriter concode_elem_sep XMLStreamWriter xmlStreamWriter concode_elem_sep String systemId concode_elem_sep String FEATURE concode_field_sep void setSystemId concode_elem_sep XMLEventWriter getXMLEventWriter concode_elem_sep XMLStreamWriter getXMLStreamWriter
target: String function ( ) { return null ; }