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

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