Speed up SWCommand registration

SpigotCore_Main/src/de/steamwar/command/SWCommand.java

@@ -80,7 +80,8 @@ public abstract class SWCommand {
         unregister();
         register();
 
-        for (Method method : getClass().getDeclaredMethods()) {
+        Method[] methods = getClass().getDeclaredMethods();
+        for (Method method : methods) {
             addMapper(Mapper.class, method, i -> i == 0, false, TypeMapper.class, (anno, typeMapper) -> {
                 if (anno.local()) {
                     localTypeMapper.put(anno.value(), typeMapper);
@@ -112,7 +113,7 @@ public abstract class SWCommand {
                 commandHelpSet.add(new SubCommand(this, method, anno.value(), new HashMap<>()));
             });
         }
-        for (Method method : getClass().getDeclaredMethods()) {
+        for (Method method : methods) {
             add(Register.class, method, i -> i > 0, true, null, (anno, parameters) -> {
                 if (anno.help()) {
                     return;