code: def converter_loader(app, entry_points=None, modules=None):
      
      if entry_points:
          for entry_point in entry_points:
              for ep in pkg_resources.iter_entry_points(entry_point):
                  try:
                      app.url_map.converters[ep.name] = ep.load()
                  except Exception:
                      app.logger.error(
                          'Failed to initialize entry point: {0}'.format(ep))
                      raise
  
      if modules:
          app.url_map.converters.update(**modules)
docs: Run default converter loader.
  
      :param entry_points: List of entry points providing to Blue.
      :param modules: Map of coverters.
  
      .. versionadded: 1.0.0