presto-phoenix/src/main/java/io/prestosql/plugin/phoenix/PhoenixTableProperties.java/PhoenixTableProperties/getMinVersions
class PhoenixTableProperties:    public static Optional<Integer> getMinVersions(Map<String, Object> tableProperties)
    {
        requireNonNull(tableProperties);

        Integer value = (Integer) tableProperties.get(MIN_VERSIONS);
        if (value == null) {
            return Optional.empty();
        }
        return Optional.of(value);
    }