7 files declare their use of SalesforceErrorEvent in Salesforce Suite 8.4

DeleteHandler.php in modules/salesforce_pull/src/DeleteHandler.php

MappedObjectForm.php in modules/salesforce_mapping_ui/src/Form/MappedObjectForm.php

PullBase.php in modules/salesforce_pull/src/Plugin/QueueWorker/PullBase.php

PushQueue.php in modules/salesforce_push/src/PushQueue.php

QueueHandler.php in modules/salesforce_pull/src/QueueHandler.php

SalesforceMappingFormCrudBase.php in modules/salesforce_mapping_ui/src/Form/SalesforceMappingFormCrudBase.php

salesforce_push.module in modules/salesforce_push/salesforce_push.module

Push updates to Salesforce when a Drupal entity is updated.