Persistent_env.Persistent_signaturetype t = {filename: string,Name of the file containing the signature.
*/cmi: Cmi_format.cmi_infos,visibility: Load_path.visibility,};let load: Stdlib.ref((allow_hidden:bool => unit_name:string => option(t)));Function used to load a persistent signature. The default is to look for the .cmi file in the load path. This function can be overridden to load it from memory, for instance to build a self-contained toplevel.