Have you ever had a problem that certain rows in the CSV files used for Migration were empty, or didn't
need to be imported because of bogus data / empty fields?
Or maybe your CSV data is de-normalised and you want to skip certain rows that would
map to the same entities, but because of the skipping, your migration always shows
Incomplete Migration? Isn't that annoying? Especially if there are other dependent migrations
on the incomplete one, which won't run unless executed with --force.