public <T> ColumnMappers register(QualifiedType<T> type, ColumnMapper<T> mapper) {
        return this.register(QualifiedColumnMapperFactory.of(type, mapper));
    }
Register a column mapper for a given {@link QualifiedType}
Column mappers may be reused by {@link RowMapper} to map individual columns.

@param type the type to match with equals.
@param mapper the column mapper
@return this
core/src/main/java/org/jdbi/v3/core/mapper/ColumnMappers.java