presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/RaptorTableProperties.java/RaptorTableProperties/stringList
class RaptorTableProperties:    @SuppressWarnings("unchecked")
    private static List<String> stringList(Object value)
    {
        return (value == null) ? ImmutableList.of() : ((List<String>) value);
    }