12 files declare their use of ParameterBag in JSON-RPC 2.x

AddPermissionToRole.php in modules/jsonrpc_core/src/Plugin/jsonrpc/Method/AddPermissionToRole.php

Cache.php in modules/jsonrpc_core/src/Plugin/jsonrpc/Method/Cache.php

ExecutableWithParamsInterface.php in src/ExecutableWithParamsInterface.php

FirstMethod.php in tests/modules/jsonrpc_test/src/Plugin/jsonrpc/Method/FirstMethod.php

Handler.php in src/Handler.php

ListPermissions.php in modules/jsonrpc_core/src/Plugin/jsonrpc/Method/ListPermissions.php

MaintenanceModeEnabled.php in modules/jsonrpc_core/src/Plugin/jsonrpc/Method/MaintenanceModeEnabled.php

Plugins.php in modules/jsonrpc_core/src/Plugin/jsonrpc/Method/Plugins.php

RouteBuilder.php in modules/jsonrpc_core/src/Plugin/jsonrpc/Method/RouteBuilder.php

RpcRequestFactory.php in src/Shaper/RpcRequestFactory.php

SecondMethod.php in tests/modules/jsonrpc_test/src/Plugin/jsonrpc/Method/SecondMethod.php

ThirdMethod.php in tests/modules/jsonrpc_test/src/Plugin/jsonrpc/Method/ThirdMethod.php