Module to store a map from procnames to error logs. Starts with an empty map.

`val iter : (Typ.Procname.t ‑> Errlog.t ‑> unit) ‑> unit`

iterate a function on map contents

`val get_errlog : Typ.Procname.t ‑> Errlog.t`

Get the error log for a given procname. If not present, then add the association from procname to an empty error log and return the latter.

`val store : string ‑> InferBase.SourceFile.t ‑> unit`

If there are any issues in the log, `store dirname filename` stores map to `infer-out/dirname/filename`. Otherwise, no file is written.

`val load : string ‑> unit`

`load directory` resets the issue map first, then walks `infer-out/directory`, merging all maps stored in the found files into the current map.