private static UUID getUUID(ResultSet r, int i, StatementContext ctx) throws SQLException {
        String s = r.getString(i);

        return s == null ? null : UUID.fromString(s);
    }
Column mapper factory which knows how to map high-level essentials like String:
<ul>
    <li>{@link BigDecimal}</li>
    <li>{@link String}</li>
    <li>{@code byte[]}</li>
    <li>{@link UUID}</li>
</ul>
core/src/main/java/org/jdbi/v3/core/mapper/EssentialsMapperFactory.java