-val string_of_version: Http_types.version -> string
-val version_of_string: string -> Http_types.version
+ (** pretty print an HTTP version *)
+val string_of_version: version -> string
+
+ (** parse an HTTP version from a string
+ @raise Invalid_HTTP_version if given string doesn't represent a supported HTTP
+ version *)
+val version_of_string: string -> version
+
+ (** pretty print an HTTP method *)
+val string_of_method: meth -> string