+ /** Do a blocking communication between two arbitrary hosts.
+ *
+ * This starts a blocking communication right away, bypassing the mailbox and actors mechanism.
+ * The calling actor is blocked until the end of the communication; there is really no limit on the hosts involved.
+ * In particular, the actor does not have to be on one of the involved hosts. Enjoy the comfort of the simulator :)
+ */
+ static void sendto(Host* from, Host* to, double simulated_size_in_bytes);