+-- |@'serializeExtMap' extMap moduleName variableName@ generates a
+-- Haskell source code which contains the following things:
+--
+-- * A definition of module named @moduleName@.
+--
+-- * @variableName :: 'ExtMap'@ whose content is a serialization of
+-- @extMap@.
+--
+-- The module "Network.HTTP.Lucu.MIMEType.DefaultExtensionMap" is
+-- surely generated using this function.
+serializeExtMap :: ExtMap -> String -> String -> String
+serializeExtMap extMap moduleName variableName