12 files declare their use of Individual in CRM Core 8.3

ActivityEntityPreDeleteTest.php in modules/crm_core_activity/tests/src/Kernel/ActivityEntityPreDeleteTest.php

ActivityTypePluginTest.php in modules/crm_core_activity/tests/src/Kernel/ActivityTypePluginTest.php

ActivityUiTest.php in modules/crm_core_activity/tests/src/Functional/ActivityUiTest.php

ContactModuleTest.php in modules/crm_core_contact/tests/src/Unit/ContactModuleTest.php

CrmCoreUserSyncRelationTest.php in modules/crm_core_user_sync/tests/src/Kernel/CrmCoreUserSyncRelationTest.php

crm_core_user_sync.module in modules/crm_core_user_sync/crm_core_user_sync.module

CRM Core User Synchronization module.

EditOwnContactInformationBlock.php in modules/crm_core_user_sync/src/Plugin/Block/EditOwnContactInformationBlock.php

FieldMatcherTest.php in modules/crm_core_match/tests/src/Kernel/FieldMatcherTest.php

IndividualCRUDTest.php in modules/crm_core_contact/tests/src/Kernel/IndividualCRUDTest.php

IndividualPrimaryFieldsTest.php in modules/crm_core_contact/tests/src/Kernel/IndividualPrimaryFieldsTest.php

IndividualUiTest.php in modules/crm_core_contact/tests/src/Functional/IndividualUiTest.php

LocalTaskTest.php in modules/crm_core_contact/tests/src/Kernel/LocalTaskTest.php