6 files declare their use of ContextDefinitionInterface

ConditionManagerTest.php in tests/src/Unit/Integration/Condition/ConditionManagerTest.php
ContextFormTrait.php in src/Context/Form/ContextFormTrait.php
ContextHandlerIntegrityTrait.php in src/Context/ContextHandlerIntegrityTrait.php
ContextHandlerTraitTest.php in tests/src/Unit/ContextHandlerTraitTest.php
RulesActionManagerTest.php in tests/src/Unit/Integration/RulesAction/RulesActionManagerTest.php
RulesComponent.php in src/Engine/RulesComponent.php