     shared_ptr<MessageCapabilities> mc0 = make_shared<MessageCapabilities>(compressionAlgos_, languages_, encoderFormats_);     shared_ptr<MessageCapabilities> emptyMc0 = make_shared<MessageCapabilities>(emptyCompressionAlgos, languages_, encoderFormats_);     shared_ptr<MessageCapabilities> emptyMc0 = make_shared<MessageCapabilities>(compressionAlgos_, 