Minor misc changes

nukkit/src/main/java/me/lucko/luckperms/nukkit/LPNukkitBootstrap.java

@@ -169,10 +169,9 @@ public class LPNukkitBootstrap extends PluginBase implements LuckPermsBootstrap
         return getResource(path);
     }
 
-    @Nullable
     @Override
-    public Player getPlayer(UUID uuid) {
-        return getServer().getOnlinePlayers().get(uuid);
+    public Optional<Player> getPlayer(UUID uuid) {
+        return Optional.ofNullable(getServer().getOnlinePlayers().get(uuid));
     }
 
     @Override

nukkit/src/main/java/me/lucko/luckperms/nukkit/LPNukkitPlugin.java

@@ -280,11 +280,7 @@ public class LPNukkitPlugin extends AbstractLuckPermsPlugin {
 
     @Override
     public Optional<Contexts> getContextForUser(User user) {
-        Player player = this.bootstrap.getPlayer(user.getUuid());
-        if (player == null) {
-            return Optional.empty();
-        }
-        return Optional.of(this.contextManager.getApplicableContexts(player));
+        return this.bootstrap.getPlayer(user.getUuid()).map(player -> this.contextManager.getApplicableContexts(player));
     }
 
     @Override