9 files declare their use of DescribablePluginTrait in GraphQL 8.3

EnumPluginBase.php in src/Plugin/GraphQL/Enums/EnumPluginBase.php

FieldPluginBase.php in src/Plugin/GraphQL/Fields/FieldPluginBase.php

InputTypePluginBase.php in src/Plugin/GraphQL/InputTypes/InputTypePluginBase.php

InterfacePluginBase.php in src/Plugin/GraphQL/Interfaces/InterfacePluginBase.php

MutationPluginBase.php in src/Plugin/GraphQL/Mutations/MutationPluginBase.php

ScalarPluginBase.php in src/Plugin/GraphQL/Scalars/ScalarPluginBase.php

SubscriptionPluginBase.php in src/Plugin/GraphQL/Subscriptions/SubscriptionPluginBase.php

TypePluginBase.php in src/Plugin/GraphQL/Types/TypePluginBase.php

UnionTypePluginBase.php in src/Plugin/GraphQL/Unions/UnionTypePluginBase.php