9 files declare their use of ProcessorsServiceInterface in Purge 8.3

DashboardController.php in modules/purge_ui/src/Controller/DashboardController.php

InvalidateCommand.php in modules/purge_drush/src/Commands/InvalidateCommand.php

ProcessorAddForm.php in modules/purge_ui/src/Form/ProcessorAddForm.php

ProcessorCommands.php in modules/purge_drush/src/Commands/ProcessorCommands.php

ProcessorDeleteForm.php in modules/purge_ui/src/Form/ProcessorDeleteForm.php

ProcessorFormController.php in modules/purge_ui/src/Controller/ProcessorFormController.php

ProcessorsAvailableDiagnosticCheck.php in src/Plugin/Purge/DiagnosticCheck/ProcessorsAvailableDiagnosticCheck.php

PurgeBlockForm.php in modules/purge_ui/src/Form/PurgeBlockForm.php

QueueCommands.php in modules/purge_drush/src/Commands/QueueCommands.php