Optimize SWCommand.internalHelp

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

@@ -36,7 +36,7 @@ import java.util.stream.Collectors;
 
 public abstract class SWCommand {
 
-    private final List<String> help = new ArrayList<>();
+    private List<String> help = null;
 
     private final Command command;
     private final List<SubCommand> commandList = new ArrayList<>();
@@ -226,7 +226,8 @@ public abstract class SWCommand {
 
     @Register(help = true)
     private void internalHelp(CommandSender sender, String... args) {
-        if (help.isEmpty()) {
+        if (help == null) {
+            help = new ArrayList<>();
             commandList.forEach(subCommand -> {
                 StringBuilder st = new StringBuilder();
                 st.append("§8/§7").append(command.getName()).append(" ");