Protocols extending Sendable lead to concurrency warnings

[JavaAdam]

When a protocol extends Sendable the generated mock is not complaint with the concurrency policy. And the following warnings occurs. I cannot guess if this is a bigger issue, because of the internal data structure?

Non-final class 'MockMyProtocol' cannot conform to 'Sendable'; use '@unchecked Sendable'

Stored property 'cuckoo_manager' of 'Sendable'-conforming class 'MockMyProtocol' has non-sendable type 'MockManager'

Stored property '__defaultImplStub' of 'Sendable'-conforming class 'MockMyProtocol' is mutable