def METHOD_NAME():
    if vsock_test_tool == "ncat":
        vsock_listen(tool_bin, port, session)
        host_vsock_session = vsock_connect(tool_bin, guest_cid, port)
    send_data = "Hello world"
    if vsock_test_tool == "nc_vsock":
        vsock_listen(tool_bin, port, session)
        host_vsock_session = vsock_connect(tool_bin, guest_cid, port)
        connected_str = r"Connection from cid*"
        check_received_data(test, session, connected_str)
    error_context.context('Input "Hello world" to vsock.', test.log.info)
    host_vsock_session.sendline(send_data)
    check_received_data(test, session, send_data)
    return host_vsock_session