We want it private for now. Maybe rename it to _elevatedPrivileges() so that we have:

```
with self._elevatedPrivileges(bla, bla):
   do_stuff
```

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The docstring need expansion.

Inform that it received a list of privileges as defined by (some link to MDSN or some othher place).

What happen when privilege is not present for the process... raise an error.