/**
* Multi-cast a message to all nodes with a specific role.
*
* @param role Destination role
* @param msg Message to send
* @param policy Quorum policy
* @return Success code
*/
public int multicast(PaxosRole.Role role, PaxosMessage msg, Quorum policy) {
// Get the number of nodes necessary for a quorum.
int expected = getQuorum(network.getNumNodes(), policy);
return multicast(role, msg, expected);
}
