Persistent_env.Persistent_signaturetype t = {filename: string,Name of the file containing the signature.
*/cmi: Cmi_format.cmi_infos,};let load: Stdlib.ref((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.