code: def resolve_to_callable(callable_name):
      
      from . import registry
      clean_callable_name = callable_name.replace(
          '{{', '').replace('}}', '').strip()
      try:
          return registry.get(clean_callable_name)
      except KeyError:
          try:
              from zope.dottedname.resolve import resolve
              return resolve(clean_callable_name)
          except ImportError:
              raise ImportError(
                  'Failed to load callable `{}`'.format(clean_callable_name))
docs: Resolve string :callable_name: to a callable.
  
      :param callable_name: String representing callable name as registered
          in ramses registry or dotted import path of callable. Can be
          wrapped in double curly brackets, e.g. '{{my_callable}}'.