code: public AddOn getAddOn(String pAddOnId) {
  
          if (mRegisteredAddOns.containsKey(pAddOnId)) {
              return mRegisteredAddOns.get(pAddOnId);
          } else {
              LOGGER.warn("Add-on " + pAddOnId + " is not loaded.");
              return null;
          }
      }
docs: Returns the registered add-on identified by the identifier.
  
  @param pAddOnId The add-on's identifier.
  @return The registered add-on identified by the identifier.