<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def download(self, resource_id):
 """Update the request URI to download the document for this resource. Args: resource_id (integer):
 The group id. """

        self.resource_id(str(resource_id))
        self._request_uri = '{}/download'.format(self._request_uri)