# File lib/fog/compute/openstack/requests/update_flavor_metadata.rb, line 5
        def update_flavor_metadata(flavor_ref, key, value)
          data = {key => value}

          request(
            :body    => Fog::JSON.encode(data),
            :expects => 200,
            :method  => 'PUT',
            :path    => "flavors/#{flavor_ref}/os-extra_specs/#{key}"
          )
        end