# File lib/fog/openstack/requests/compute/set_metadata.rb, line 7
        def set_metadata(collection_name, parent_id, metadata = {})
          request(
            :body     => MultiJson.encode({ 'metadata' => metadata }),
            :expects  => 200,
            :method   => 'PUT',
            :path     => "#{collection_name}/#{parent_id}/metadata"
          )
        end