question: public void remove ( String attrName , String delValue ) { int index = indexOf ( attrName ) ; if ( index != - 1 ) { Attr attr = ( Attr ) _attrs . get ( index ) ; attr . removeValue ( delValue ) ; if ( attr . size ( ) == 0 ) { _attrs . remove ( index ) ; } } }
target:  Remove a specified value for an attribute in the set