code: private ExtensionHandler getExtensionHandler(LocalExtension localExtension) throws ComponentLookupException
      {
          return this.componentManager.getInstance(ExtensionHandler.class, localExtension.getType().toLowerCase());
      }
docs: Get the handler corresponding to the provided extension.
  
  @param localExtension the extension to handler
  @return the handler
  @throws ComponentLookupException failed to find a proper handler for the provided extension