`sig
type buf
val create : int -> CamomileLibrary.UTF16.Buf.buf
val contents : CamomileLibrary.UTF16.Buf.buf -> CamomileLibrary.UTF16.t
val clear : CamomileLibrary.UTF16.Buf.buf -> unit
val reset : CamomileLibrary.UTF16.Buf.buf -> unit
val add_char :
CamomileLibrary.UTF16.Buf.buf -> CamomileLibrary.UChar.t -> unit
val add_string :
CamomileLibrary.UTF16.Buf.buf -> CamomileLibrary.UTF16.t -> unit
val add_buffer :
CamomileLibrary.UTF16.Buf.buf -> CamomileLibrary.UTF16.Buf.buf -> unit
end`