question: public static String buildScenario ( List < String > urlList ) { if ( urlList == null || urlList . isEmpty ( ) ) { return null ; } StringBuilder strb = new StringBuilder ( ) ; strb . append ( buildHeader ( ) ) ; Iterator < String > iter = urlList . iterator ( ) ; while ( iter . hasNext ( ) ) { strb . append ( buildGetStep ( ( iter . next ( ) ) ) ) ; if ( iter . hasNext ( ) ) { strb . append ( COMMA ) ; } } strb . append ( buildFooter ( ) ) ; return strb . toString ( ) ; }
target:  Build a scenario from a list of url