// Configure SSL authentication grpc::testing::End2EndTestConfig config; config.set_security_params(true, "", ""); // Set message size and frequency config.set_client_message_size(1024); // 1 KB config.set_server_message_size(4096); // 4 KB config.set_client_stream_messages(10); config.set_server_stream_messages(100); // Simulate network conditions config.set_network_emulation(grpc::testing::NetworkSimulationConfig::LOSSY_CONNECTION); config.set_network_emulation_config(0.1, 100, 100, 100);In the above code examples, we can see how different parameters can be set using the `set_xxx` methods provided by the `End2EndTestConfig` object. We can set up SSL authentication by passing true to the `set_security_params` method, and configure message size and frequency using `set_client_message_size`, `set_server_message_size`, and `set_client_stream_messages`, `set_server_stream_messages` respectively. We can also simulate different network conditions using `set_network_emulation` and `set_network_emulation_config`. This package belongs to the `grpc` library.