Fix isEmpty check in ColoredText

src/main/java/net/minestom/server/chat/ColoredText.java

@@ -20,7 +20,7 @@ import java.util.regex.Pattern;
 public class ColoredText extends JsonMessage {
 
     // the raw text
-    private StringBuilder message = new StringBuilder();
+    private final StringBuilder message = new StringBuilder();
 
     /**
      * Creates a colored text.
@@ -160,7 +160,7 @@ public class ColoredText extends JsonMessage {
     protected List<JsonObject> getComponents() {
         final List<JsonObject> objects = new ArrayList<>();
         // No message, return empty list
-        if (message.isEmpty())
+        if (getMessage().isEmpty())
             return objects;
 
         boolean inFormat = false;

src/main/java/net/minestom/server/command/builder/CommandDispatcher.java

@@ -58,6 +58,7 @@ public class CommandDispatcher {
      * @param commandString the command (containing the command name and the args if any)
      * @return the result of the parsing, null if the command doesn't exist
      */
+    @Nullable
     public CommandResult parse(@NotNull String commandString) {
         commandString = commandString.trim();
 

src/main/java/net/minestom/server/entity/ai/goal/EatBlockGoal.java

@@ -7,7 +7,6 @@ import net.minestom.server.instance.Instance;
 import net.minestom.server.utils.BlockPosition;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.Map;
 import java.util.Random;
 
 public class EatBlockGoal extends GoalSelector {