protected static String convert(double[][] value) {
        StringBuilder builder = new StringBuilder().append('[');
        for (int i = 0, len = value.length; i < len; i++) {
            builder.append(ClickHouseGeoPointValue.convert(value[i])).append(',');
        }

        if (builder.length() > 1) {
            builder.setLength(builder.length() - 1);
        }
        return builder.append(']').toString();
    }
Update value of the given object or create a new instance if {@code ref} is
null.

@param ref   object to update, could be null
@param value value
@return same object as {@code ref} or a new instance if it's null
clickhouse-data/src/main/java/com/clickhouse/data/value/ClickHouseGeoRingValue.java