`module Bigstring_shared : sig ... end`
`module Email : sig ... end`
`module Email_address = Email_message__.Email_address1`
`module Email_headers = Email_message__.Headers`
`module Email_selector = Email_message__.Selector`
`module Email_wrapper = Email_message__.Wrapper`
`module Mimestring : sig ... end`
`module Octet_stream : sig ... end`
`module String_monoid : sig ... end`

Simple library for concatenating immutable strings efficiently

`module Email_message_stable : sig ... end`
`module Private : sig ... end`