public object PatchMail(JsonPatchDocument patchedMail, Guid id)
{
if (patchedMail == null)
{
return(BadRequest());
}
var mail = mailingRepository.Retrieve(id);
if (mail == null)
{
return(NotFound());
}
patchedMail.ApplyTo(mail);
mailingService.Save(id, mail);
return(Ok(mail));
}