11 files declare their use of IndividualType in CRM Core 8.3

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

CrmCoreDemoTest.php in modules/crm_core_demo/tests/src/Functional/CrmCoreDemoTest.php

DefaultMatchingEngineUITest.php in modules/crm_core_match/tests/src/Functional/DefaultMatchingEngineUITest.php

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

IndividualAccessControlHandler.php in modules/crm_core_contact/src/IndividualAccessControlHandler.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

RuleForm.php in modules/crm_core_user_sync/src/Form/RuleForm.php

SettingsForm.php in modules/crm_core_user_sync/src/Form/SettingsForm.php