Declaring highwater property in Migrate I would like to know how to correctly define the highwater property when using Migrate for Drupal 8. I am doing an import from a legacy non drupal database and I should be able to update only the relevant nodes whenever a column highwater changed. According to the official documentation, the solution is to use a highwater property. How to declare it? Is it a property to be set in the Plugin mapping class or is it an entry in the migrate.migration.*.yml file?
Thanks!
highWaterProperty renamed to high_water_property, and moved from the top-level migration plugin configuration into the source plugin configuration.

id: my_migration
source:
  high_water_property:
    name: changed


For more information, see: https://www.drupal.org/node/2795403