Be able to add AbilityExtensions in Bot constructor

telegrambots-abilities/src/main/java/org/telegram/abilitybots/api/bot/BaseAbilityBot.java

@@ -106,6 +106,7 @@ public abstract class BaseAbilityBot extends DefaultAbsSender implements Ability
     private final String botUsername;
 
     // Ability registry
+    protected final List<AbilityExtension> extensions = new ArrayList<>();
     private Map<String, Ability> abilities;
     private Map<String, Stats> stats;
 
@@ -280,10 +281,10 @@ protected boolean allowContinuousText() {
     private void registerAbilities() {
         try {
             // Collect all classes that implement AbilityExtension declared in the bot
-            List<AbilityExtension> extensions = stream(getClass().getMethods())
+            extensions.addAll(stream(getClass().getMethods())
                     .filter(checkReturnType(AbilityExtension.class))
                     .map(returnExtension(this))
-                    .collect(Collectors.toList());
+                    .collect(Collectors.toList()));
 
             // Add the bot itself as it is an AbilityExtension
             extensions.add(this);