@Override
    public Mappers createCopy() {
        return new Mappers();
    }
Obtain a mapper for the given qualified type. If the type is unqualified,
and a row mapper is registered for the given type, it is returned. If a
column mapper is registered for the given qualified type, it is adapted
into a row mapper, mapping the first column of the result set. If neither
a row or column mapper is registered, empty is returned.

@param type the target qualified type to map to
@return a mapper for the given type, or empty if no row or column mapper
is registered for the given type.
core/src/main/java/org/jdbi/v3/core/mapper/Mappers.java