public abstract class ReceiveableMonobehaviour : RegisterableMonobehaviour {

        /// <summary>
        /// Should return the accepted CMD for packets.
        /// </summary>
        /// <returns></returns>
        protected virtual String validCMD() { return "null"; }

        /// <summary>
        /// Should return the valid message/key in the receiving packet.
        /// </summary>
        /// <returns></returns>
        protected virtual String validMessage() { return "null";  }
    }




public abstract class MultiReceivableMonobehaviour : ReceiveableMonobehaviour {



        /// <summary>
        /// This method overrides the original Receiver.received(); method to make it execute the actions instead of the process method.
        /// </summary>
        /// <param name="cmd"></param>
        /// <param name="msg"></param>
        /// <param name="packet"></param>
        protected override void received(String cmd, ISFSObject packet) {

            UnityEngine.Debug.Log("<INCOMING : CMD -> "+cmd+" CMD 2 -> "+validCMD()+ " Packet -> "+inPacket(packet));

            if (!validCMD().Equals(cmd)) return;
            if (!inPacket(packet)) return;

            string msg = getFromPacket(packet);

            if (bypass(msg)) {

                // DO Stuff
            }

   			// DO OTHER STUFF
        }

        protected override string validMessage() { throw new System.NotImplementedException(); }
    }



public abstract class GameScreen : MultiReceivableMonobehaviour, Transferable { // MORE STUFF }

public class LeaderboardsScreen : GameScreen {

	// THIS never gets overriden somehow... calling this.received(cmd, packet) calls validCMD(); which return "null"...
    protected override String validCMD() { return "LeaderboardManager_Fire"; }
}