question: private void fillDeclaredPrefixes ( Iterator namespaces ) { fDeclaredPrefixes . clear ( ) ; while ( namespaces . hasNext ( ) ) { Namespace ns = ( Namespace ) namespaces . next ( ) ; String prefix = ns . getPrefix ( ) ; fDeclaredPrefixes . add ( prefix != null ? prefix : "" ) ; } }
target:  Fills in the list of declared prefixes.