Add EngineConnectionState#connection

Author: aromaa

src/main/java/org/spongepowered/api/network/ClientConnectionState.java

@@ -32,6 +32,15 @@
  */
 public interface ClientConnectionState extends EngineConnectionState {
 
+    /**
+     * Gets the associated {@link ClientSideConnection connection} for
+     * this connection state.
+     *
+     * @return The connection
+     */
+    @Override
+    ClientSideConnection connection();
+
     /**
      * Represents the intent state of the connection
      * from the client to the server on the client side.

src/main/java/org/spongepowered/api/network/EngineConnectionState.java

@@ -33,6 +33,14 @@
  */
 public interface EngineConnectionState {
 
+    /**
+     * Gets the associated {@link EngineConnection connection} for
+     * this connection state.
+     *
+     * @return The connection
+     */
+    EngineConnection connection();
+
     /**
      * Gets whatever the connection was established because
      * the client was transferred.

src/main/java/org/spongepowered/api/network/ServerConnectionState.java

@@ -31,6 +31,15 @@
  */
 public interface ServerConnectionState extends EngineConnectionState {
 
+    /**
+     * Gets the associated {@link ServerSideConnection connection} for
+     * this connection state.
+     *
+     * @return The connection
+     */
+    @Override
+    ServerSideConnection connection();
+
     /**
      * Represents a intent state between a minecraft client and server.
      */