public static extern int zmq_msg_init_data_v3(IntPtr msg, IntPtr data, int size, FreeMessageDataCallback ffn, IntPtr hint);
public static extern Result zmq_msg_init_data(this message msg, IntPtr data, int size, FreeMessageDataCallback ffn, IntPtr hint);
public static extern int zmq_msg_init_data_v3(IntPtr msg, IntPtr data, int size, FreeMessageDataCallback ffn, IntPtr hint);