You can search for identifiers within the package.
in-package search v0.2.0
type directory_t = {
directory : Uri.t;
new_authz : Uri.t;
new_reg : Uri.t;
new_cert : Uri.t;
revoke_cert : Uri.t;
}
val domains_of_csr : X509.Signing_request.t -> string list
val letsencrypt_url : Uri.t
val letsencrypt_staging_url : Uri.t