Documentation for Repository.GetReviewers is incorrect.
Some kind of cut and paste confusion with Repository.GetProtectionEntries.
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GetReviewersCmdOptions opts =
new GetReviewersCmdOptions(GetReviewersCmdFlags.None, 0);
FileSpec filespec =
new FileSpec(new DepotPath("//depot/main/src/..."), null);
IList<FileSpec> filespecs = new List<FileSpec>();
filespecs.Add(filespec);
IList<ProtectionEntry> target =
Repository.GetProtectionEntries(filespecs, opts);To get the list of users who are reviewing submitted changelist 83476: