Some help in ExtensionPoint regarding DISPLAYTEST. Let's improve those tick rates!

Signed-off-by: cpw <cpw+github@weeksfamily.ca>

src/main/java/net/minecraftforge/fml/ExtensionPoint.java

@@ -40,6 +40,33 @@ public class ExtensionPoint<T>
      *
      * The supplier provides my "local" version for sending across the network or writing to disk
      * The predicate tests the version from a remote instance or save for acceptability (Boolean is true for network, false for local save)
+     * and returns true if the version is compatible.
+     *
+     * <p>Return {@link net.minecraftforge.fml.network.FMLNetworkConstants#IGNORESERVERONLY} in the supplier, if you wish to be ignored
+     * as a server side only mod.</p>
+     * <p>Return true in the predicate for all values of the input string (when network boolean is true) if you are client side,
+     * and don't care about matching any potential server version.</p>
+     *
+     * <p>
+     * Examples: A server only mod
+     *
+     * <code><pre>
+     *     registerExtensionPoint(DISPLAYTEST, ()->Pair.of(
+     *      ()->FMLNetworkConstants.IGNORESERVERONLY, // ignore me, I'm a server only mod
+     *      (s,b)->true // i accept anything from the server or the save, if I'm asked
+     *     )
+     * </pre></code>
+     * </p>
+     * <p>
+     * Examples: A client only mod
+     * <code><pre>
+     *     registerExtensionPoint(DISPLAYTEST, ()->Pair.of(
+     *      ()->"anything. i don't care", // if i'm actually on the server, this string is sent but i'm a client only mod, so it won't be
+     *      (remoteversionstring,networkbool)->networkbool // i accept anything from the server, by returning true if it's asking about the server
+     *     )
+     * </pre></code>
+     * </p>
+     *
      */
     public static final ExtensionPoint<Pair<Supplier<String>, BiPredicate<String, Boolean>>> DISPLAYTEST = new ExtensionPoint<>();