code: public List<AbstractPlugin> getActiveScanRules () {
  		ArrayList<AbstractPlugin> list = new ArrayList<>();
  		for (AddOn addOn : getAddOnCollection().getAddOns()) {
  			AddOnClassLoader addOnClassLoader = this.addOnLoaders.get(addOn.getId());
  			if (addOnClassLoader != null) {
  				list.addAll(AddOnLoaderUtils.getActiveScanRules(addOn, addOnClassLoader));
  			}
          }
  		list.trimToSize();
  		return Collections.unmodifiableList(list);
  	}
docs: Gets the active scan rules of all the loaded add-ons.
  <p>
  The discovery of active scan rules is done by resorting to  {@link AddOn#MANIFEST_FILE_NAME manifest file} bundled in the
  add-ons.
  
  @return an unmodifiable {@code List} with all the active scan rules, never {@code null}
  @since 2.4.0
  @see AbstractPlugin