Library.PrivateSourceval rewrite :
t ->
sexps_rewriter:Sexps_rewriter.t ->
field:Sexplib0.Sexp.t ->
load_existing_libraries:Base.bool ->
Base.unitAt this time we export rewrite with an altered type, to add the extra flag load_existing_libraries. Using true causes existing libraries to be read and added to the in-memory value prior to rewriting. This is used internally by a private tool but shall disappear after some refactoring has happened.