setNoIncoming will disable any message incoming for the player.

Author: Dviih

src/main/java/pro/cloudnode/smp/cloudnodemsg/message/Message.java

@@ -5,6 +5,7 @@
 import org.bukkit.OfflinePlayer;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.bukkit.persistence.PersistentDataContainer;
 import org.bukkit.persistence.PersistentDataType;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -81,4 +82,8 @@ else if (player.isOnline())
 
     public static final @NotNull NamespacedKey INCOMING_ENABLED = new NamespacedKey(CloudnodeMSG.getInstance(), "incoming_enabled");
 
+    public static void setNoIncoming(final @NotNull OfflinePlayer player) {
+        final @NotNull PersistentDataContainer container = Objects.requireNonNull(player.getPlayer()).getPersistentDataContainer();
+        container.set(INCOMING_ENABLED, PersistentDataType.BOOLEAN, Objects.requireNonNull(container.get(INCOMING_ENABLED, PersistentDataType.BOOLEAN)).equals(false));
+    }
 }