def _volume_offset_changed(self, event):
        new_value = self._volume_offset_text.GetValue()
        try:
            new_value = int(new_value)
            self._model.set_volume_offset(new_value)
            self._volume_offset_label.SetValue(self._volume_offset_label_ok)
        except ValueError:
            self._volume_offset_label.SetValue(self._volume_offset_label_fail)
Create a new :class:`.Transaction` within this session.
dataset/ETHPy150Open williballenthin/INDXParse/MFTView.py/DiskGeometryWarningPanel._volume_offset_changed--crossover with--dataset/ETHPy150Open nigelsmall/py2neo/py2neo/packages/neo4j/v1/session.py/Session.begin_transaction