Make common config screen registration tasks easier, backport of #9884 (#9913)

src/main/java/net/minecraftforge/client/ConfigScreenHandler.java

@@ -13,10 +13,30 @@ import net.minecraftforge.forgespi.language.IModInfo;
 
 import java.util.Optional;
 import java.util.function.BiFunction;
+import java.util.function.Function;
 
 public class ConfigScreenHandler
 {
-    public record ConfigScreenFactory(BiFunction<Minecraft, Screen, Screen> screenFunction) implements IExtensionPoint<ConfigScreenFactory> {}
+    /**
+     * @param screenFunction A function that takes the {@link Minecraft} client instance and the mods screen as
+     *                       arguments and returns your config screen to show when the player clicks the config button
+     *                       for your mod on the mods screen.
+     *                       <p>You should call {@link Minecraft#setScreen(Screen)} with the provided client instance
+     *                       and mods screen for the action of your close button.</p>
+     */
+    public record ConfigScreenFactory(BiFunction<Minecraft, Screen, Screen> screenFunction) implements IExtensionPoint<ConfigScreenFactory> {
+        /**
+         * @param screenFunction A function that takes the mods screen as an argument and returns your config screen to
+         *                       show when the player clicks the config button for your mod on the mods screen.
+         *                       <p>You should call {@link Minecraft#setScreen(Screen)} with the provided mods screen
+         *                       for the action of your close button, using {@link Screen#minecraft} to get the client
+         *                       instance.</p>
+         */
+        public ConfigScreenFactory(Function<Screen, Screen> screenFunction) {
+            this((mcClient, modsScreen) -> screenFunction.apply(modsScreen));
+        }
+    }
+
     public static Optional<BiFunction<Minecraft, Screen, Screen>> getScreenFactoryFor(IModInfo selectedMod)
     {
         return ModList.get().getModContainerById(selectedMod.getModId()).