'Closes all open connections and empties the connection cache.
If multiple connections are opened, this keyword should be used in
a test or suite teardown to make sure that all connections are closed.
It is not an error is some of the connections have already been closed
by `Close Connection`.
After this keyword, new indexes returned by `Open Connection`
keyword are reset to 1.'

def close_all_connections(self):

    self._conn = self._cache.close_all()
