code: def CreateTrigger(self, collection_link, trigger, options=None):
          
          if options is None:
              options = {}
  
          collection_id, path, trigger = self._GetContainerIdWithPathForTrigger(collection_link, trigger)
          return self.Create(trigger,
                             path,
                             'triggers',
                             collection_id,
                             None,
                             options)
docs: Creates a trigger in a collection.
  
          :param str collection_link:
              The link to the document collection.
          :param dict trigger:
          :param dict options:
              The request options for the request.
  
          :return:
              The created Trigger.
          :rtype:
              dict