pub fn failingFileSetOwner(userdata: ?*anyopaque, file: File, owner: ?File.Uid, group: ?File.Gid) File.SetOwnerError!void
pub fn failingFileSetOwner(userdata: ?*anyopaque, file: File, owner: ?File.Uid, group: ?File.Gid) File.SetOwnerError!void { _ = userdata; _ = file; _ = owner; _ = group; return error.FileNotFound; }