# File lib/deltacloud/drivers/mock/mock_driver.rb, line 425
    def update_blob_metadata(credentials, opts={})
      check_credentials(credentials)
      safely do
        blob = @client.load(:blobs, params[:id])
        return false unless blob
        blob[:user_metadata] = BlobHelper::rename_metadata_headers(opts['meta_hash'], '')
        @client.store(:blobs, blob)
      end
    end