question: private static Set < String > parseDelimitedParameters ( Set < String > parametersToParse ) { Set < String > parsedParameters = new LinkedHashSet < > ( ) ; if ( parametersToParse != null && ! parametersToParse . isEmpty ( ) ) { for ( String parameterToParse : parametersToParse ) { parsedParameters . addAll ( Arrays . asList ( parameterToParse . split ( JSON_API_PARAM_DELIMITER ) ) ) ; } } return parsedParameters ; }
target:  Returns a list of all of the strings contained in parametersToParse.  If any of the strings contained in parametersToParse is a comma-delimited list, that string will be split into substrings and each substring will be added to the returned set (in place of the delimited list).