def clear(self):
        self._reverse_mapping = {
            self.root_path: self._root,
        }
        for node in list(self._root.reverse_iter()):
            node.disassociate()
Check if the mat struct contains 'EEG'.
dataset/ETHPy150Open openstack/taskflow/taskflow/persistence/backends/impl_memory.py/FakeFilesystem.clear--crossover with--dataset/ETHPy150Open mne-tools/mne-python/mne/io/eeglab/eeglab.py/_check_mat_struct