presto-hive/src/main/java/io/prestosql/plugin/hive/HiveTableProperties.java/HiveTableProperties/getHeaderSkipCount
class HiveTableProperties:    public static Optional<Integer> getHeaderSkipCount(Map<String, Object> tableProperties)
    {
        return Optional.ofNullable((Integer) tableProperties.get(SKIP_HEADER_LINE_COUNT));
    }