More notes for the patch in #21.
The source field contains 13 properties whil...

More notes for the patch in #21.

The source field contains 13 properties while destination contains 10. In the source, name_line, first_name, and last_name are combined to a single property and sub_administrative_area and sub_premise are removed entirely. In the destination, sorting_code is a new property and I just set it to empty string. For the name, I first check name_line and if it is empty, I concatenate first_name and last_name and set that to the new name property.