code: def create_draft(self, layer_id):
          
          target_url = self.client.get_url('VERSION', 'POST', 'create', {'layer_id': layer_id})
          r = self.client.request('POST', target_url, json={})
          return self.create_from_result(r.json())
docs: Creates a new draft version.
  
          If anything in the data object has changed then an import will begin immediately.
          Otherwise to force a re-import from the previous sources call :py:meth:`koordinates.layers.LayerManager.start_import`.
  
          :rtype: Layer
          :return: the new version
          :raises Conflict: if there is already a draft version for this layer.