question: public static LinkedList < String > wrapInTag ( LinkedList < String > sequence , int startPosition , int endPosition , String tag , String cssClass ) { LinkedList < String > result = ( LinkedList < String > ) sequence . clone ( ) ; StringBuilder tagBuilder = new StringBuilder ( ) ; tagBuilder . append ( "<" ) ; tagBuilder . append ( tag ) ; if ( cssClass != null ) { tagBuilder . append ( " class=\"" ) ; tagBuilder . append ( cssClass ) ; tagBuilder . append ( "\"" ) ; } tagBuilder . append ( ">" ) ; String startTag = tagBuilder . toString ( ) ; tagBuilder . delete ( 0 , tagBuilder . length ( ) ) ; tagBuilder . append ( "</" ) ; tagBuilder . append ( tag ) ; tagBuilder . append ( ">" ) ; String endTag = tagBuilder . toString ( ) ; result . add ( startPosition , startTag ) ; result . add ( endPosition , endTag ) ; return result ; }
target:  Wrap the elements in the sequence with the given tag